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Why compress ppt files.

PPT also goes by the name of PowerPoint Presentation and are used in all walks of life including the home, school and at work. PPT files can range in size depending on the content of the presentation. If a presentation contains a lot of images or videos then the file size can be especially large. Even just one high resolution image - such as a BMP - can increase the size of a PPT file tenfold. When a user complains that they have run out of space in their mailbox it is typically because they've been sent one too many large presentations. It is not surprising then that there is such a need to compress PPT files so that they do not take up as much storage and can be more easily shared. Using the Zamzar PPT compression tool, individual (and sizeable) elements - such as pictures and videos - are compressed bringing the overall file size down. Once compressed, the PPT (including the images and video within it) does not suffer from any noticeable loss in quality despite the file size being shrunk. It's worth remembering that if you receive a PPT file and need to send it on you can always put it through the Zamzar compression tool before you do so.

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Reduce the file size of your PowerPoint presentations

If the file size of your presentation is too large, try the following tips to make it more manageable.

Compress pictures in your presentation

Select a picture in your document. The Picture Format tab appears.

On the Picture Format tab, in the Adjust group, select Compress Pictures .

Under Compression options , do any of the following:

Make sure that Apply only to this picture is not selected so that the changes you make here will apply to all pictures in the document.

Select Delete cropped areas of pictures . This option removes the cropped picture data but note that if you delete the cropped picture data, you won't be able to restore it.

Under Resolution , select Use default resolution .

Under Compression options , do either of the following:

Select Delete cropped areas of pictures . This option removes the cropped picture data but note that if you delete the cropped picture data, you won't be able to restore it.

Delete image editing data and lower default resolution

By default, when you edit an image, the data from the original is retained (to ensure the image can be restored). Discarding it means that you can't restore the changes you make, but it will reduce your file size. Lowering the default resolution for images also reduces your overall file size.

Go to File > Options > Advanced .

Under Image Size and Quality , do the following:

Select Discard editing data . This option removes stored data that's used to restore the image to its original state after it's been edited. Note that if you discard editing data, you won't be able to restore the image after you edit it.

Make sure that Do not compress images in file is not selected.

Reduce the character set of embedded fonts

To make your presentation more sharable with others who don't have the same fonts in their system, it's typical to embed the fonts you use. However, embedded fonts will increase your file size. To minimize the file increase, embed only those characters used in the presentation.

Go to File > Options > Save .

Note:  If you've used custom fonts and want others to edit the presentation, select Embed all characters .

Reduce the file size of your Excel spreadsheets

Reduce the file size of your Word documents

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Compress PPT Presentations Online

May 8, 2023 by Hung Nguyen

Learn how to reduce the size of your PPT files significantly, at no cost, using Smallpdf. No watermark, no registration, and no installation.

We’ve come across many large PPT files in our years of compressing digital documents, from sales pitches to lecture material and business proposals. Usually, the need to reduce the size of these files comes from having to share them via email, where the file size cap is around 20 MB. Compressing PowerPoint files also comes in handy to save storage space, be it on your local computer or an otherwise pricey cloud service such as Dropbox. You can use our online compress tool to shrink your PPT down significantly and thus make your life easier and save some money.

How to Compress a PPT File for Free

Upload your ppt to the compress tool ., choose “basic compression.”, click on “export as” and choose powerpoint..

Convert, compress, and download your PPT using Smallpdf

You can get started with compressing your PowerPoint presentation for free right away. You don’t need a Smallpdf account—just go to the tool and drop your file in!

Will the Document’s Formatting Remain the Same?

We aim to maintain the layout and quality of your document as close to the original PPT as possible. We actually first turn your PowerPoint into a PDF document; then, our compressor looks for repeating patterns in the data and replaces them with unique identifiers. This is actually what makes your file smaller. This process doesn’t touch attributes like fonts and the layout of your PPT, so they should stay just as they are.

Smallpdf caters to millions of users every month and uses the most reliable software on the internet to convert, edit, and compress files. So, you can trust that we’ll produce only the absolute best conversion quality.

There are extra measures that you can take to be absolutely sure that the final content resembles its original form. You can “embed” the fonts of the text in your PowerPoint presentation. You’ll find this option under “Preferences” in PowerPoint. Doing this will ensure that the fonts remain the same, even when we don’t have the same ones on our servers.

You can repeat the above process for each file if you need to compress multiple PowerPoint files or want to compress images and other formats. Smallpdf accepts all Microsoft Office files and JPG images. If you go Pro, you can also compress files in batches, and we’ll conveniently store them in a zip file for you. Why not sign up for a 7-day free Pro trial before fully committing?

And that’s all there is to it! Enjoy compressing your PPT and be sure to explore the many other tools we offer.

Hurray for smaller presentations!

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How-To Geek

How to reduce the file size of a powerpoint presentation.

Need to chip off some KB from your presentation's file size? Try some of these handy tips.

Quick Links

Convert your presentation to the pptx format, insert your pictures—don’t copy and paste, do image edits in an image editor—not in powerpoint, compress all of the images in your presentation, don’t use embedded fonts, link to files instead of embedding them, don’t store a thumbnail for the presentation, remove personal and hidden information from your presentation, turn off autorecover, copy everything into a new presentation, a possibility: unzip the presentation and compress it.

Considering that Microsoft PowerPoint presentations are generally accompanied with tons of images, gifs , embedded videos , charts , graphs, and other content, it’s no surprise that you get some pretty big files. Here are a few steps you can take to reduce a presentation's file size.

Large files can be annoying. They take up loads of precious disk space, slow down playback performance, and can cause emails to bounce back due to exceeding the file size limit. You can prevent all of these things by reducing the file size of your presentation.

We’ve mentioned it before, but the first thing you’d think of when considering file size reduction is images—and for a good reason. Image files can be quite large. There are steps you can take to reduce the size, such as compressing the images in the presentation. If you suspect the reason your PowerPoint file is so large is due to images, then be sure to read the article we’ve written on how to reduce the size of Office documents that contain images .

Related: How to Reduce the Size of a Microsoft Word Document

We do have some additional tips to add if you followed these steps but still need to reduce your presentation’s file size.

Microsoft released the PPTX format in Office 2007. Still, it’s not uncommon to see PPT files floating around. So what’s the difference between a PPT and PPTX  file? The PPTX version compresses all of the content within the presentation. If you have a PPT file and convert it into a PPTX file, you’ll notice a decrease in the file size.

Converting the file is as simple as pressing a button and choosing the file type. Go ahead and open your PPT file, head over to the “File” tab, and then click “Convert.”

Windows File Explorer will appear. You’ll notice the Save As type is set as "PowerPoint Presentation." This is the PPTX file type. Click “Save.”

Your PPT file will now be converted to a PPTX file. As you can see, the size of the file has been reduced.

HTG Presentation 2 is our PPT file, and HTG Presentation 3 is our PPTX file. Merely converting the file type reduced the size by 335 KB.

While this isn’t a breathtaking drop in file size, we managed to reduce a Word document file size from 6,001 KB to 721 KB. It all depends on what’s inside the file. With any luck, this will be the only step you need to take. If not, keep reading.

It’s tempting to copy and paste an image in PowerPoint instead of using the insert function. This won’t be an issue if you’re not concerned about file size, but if you are, then beware of copy and paste—it may reformat your image to BMP or PNG. Why is this an issue? Both of those file formats are larger than JPG.

You can see in the above screenshot that the PNG file is 153KB compared to the 120KB JPG file of the same image. Each time you copy and paste a JPG file to PowerPoint, and it gets converted to PNG, you’re adding a bit of unnecessary file size to the presentation. Using the insert function will ensure your images are inserted as intended.

When you insert an image in PowerPoint, it’s best to make sure that it doesn’t need any edits. If it does require edits, you’re better off doing it in an image editor. Why? When you use PowerPoint to edit your image, it stores all of those edits as part of the presentation. For example, when you change an image to black and white, PowerPoint retains the full-color image as well. That’s a lot of extra bites being stored.

If you don’t have an image editor ( you do ) or you simply must use PowerPoint, be sure to tell PowerPoint to discard all of that excess data saved from the edits . It won't save you as much space as working in a dedicated editor, but it will help.

You can compress images in PowerPoint one at a time or all at once. If you’re looking to do the latter, here’s how.

Open your presentation, head over to the “File” tab, and then select “Save As” in the left-hand pane.

Next, select “More Options,” which you'll find under the area where you would name your file and choose the file type.

The “Save As” window will appear—this time with a few extra options available to you. Next to the “Save” button, click “Tools.”

In the drop-down menu that appears, select “Compress Pictures.”

The “Compress Pictures” window will appear. Here, you can choose the resolution type of the images (based on PPI) in the presentation. You’ll also notice that you’re not able to select the “Apply only to this picture” option in the “Compression Options” group. That’s because, due to the way we accessed this tool, this option isn’t available.

Note:  If you do want to compress a single picture, select it and then head to Picture Tools Format > Compress Pictures.

Once you’re happy with your selection, click “OK.”

Be sure to save your presentation afterward.

We get why you might want to embed fonts—you might be making a Star Wars themed presentation and, as a result, anyone you may be sharing the presentation with is not likely to have those special fonts available to them. Embedding the fonts in your presentation could prevent issues down the line, but it comes at the cost of increased file sizes.

In general, unless you are sure you need to display a particular font, we recommend turning off font embedding.

Head over to the “File” tab and select “Options” at the bottom of the left-hand pane.

On the “Save” tab, untick the “Embed fonts in the file” checkbox and then click “OK.”

We saved a copy of our presentation with all fonts embedded, without fonts embedded, and with only the fonts used in the presentation embedded. Look at the difference if file sizes:

Convinced yet?

Consider the difference in file size if you embed an entire YouTube video in your presentation instead of linking back to it. Embedding an entire video will significantly increase the size of your presentation. There are certainly some valuable benefits when embedding a file vs. linking to it (such as when the recipient might not have internet access to play the video), but if the file size is an issue, just don’t do it.

Way back when Office let you save thumbnail images of your presentation so that you could get a sneak preview of the file when searching for it in File Explorer. Windows has grown to be more sophisticated, so it no longer requires the help of Office applications to do this. But, the option is still available.

We ran a little test to see the difference in file size with and without this option enabled. Here are the results:

With the thumbnail option enabled, our file size was 2,660 KB. Without the option enabled, the file size was reduced to 2,662 KB, saving a total of 7 KB.

This is a pretty small save, but when we tested it with a Word document, the difference was significant, showing 721 KB without the option enabled, and 3,247 KB with the option enabled.

While this is a large gap between applications and it’s not exactly clear why the difference is so large, it’s still an option worth exploring. To disable the feature, open your presentation, head over to the “File” tab, and then select “Properties” found on the right-hand side, then “Advanced Properties.”

You’ll now be in the “Summary” tab of the “Properties” window. At the bottom of the window, uncheck the box next to “Save preview picture,” and then click “OK.”

Microsoft Office will store your personal information (such as author name) and hidden properties within your presentation. Getting rid of this information can save you a bit of space.

Open your presentation, head over to the “File” tab, select the “Check for Issues” option, then select “Inspect Document."

The “Document Inspector” window will appear. Make sure the “Document Properties and Personal Information” box is checked, and then click “Inspect."

In the next window, select “Remove All.” The information will now be removed, saving you a few KB of space.

We don’t necessarily recommend this, and it should only be used as a last resort effort. AutoRecover is an essential tool in Office, and if you’ve ever lost a document before saving, then you understand precisely what we mean.

Each time Office uses AutoRecover, it adds a little to the size of the file. To turn AutoRecover off, head over to the “File” tab and select “Options” found at the bottom of the left-hand pane.

In the “Save” tab of the “Options” window, uncheck the box next to “Save AutoRecover information ever xx minutes.”

If you save and exit out of the presentation immediately, you won’t notice a difference. Over time though, as you continue to progress through the presentation, the AutoRecover feature will add KB to your file.

While you’re creating your presentation, PowerPoint will save various things in the background to help you out. We’ve mentioned how to turn off a lot of these features, delete data PowerPoint saves, and so on, but there’s always a chance something slipped through the cracks, and PowerPoint stored some information you don’t need. Copying your content over to a new presentation may be a good solution to the problem.

This may be a bit of a hassle though as, with PowerPoint, you’ll need to copy and paste each slide (and master slides). Once you do though, the new presentation won’t have any of the previous background saves, AutoRecover information, or previous versions of the file. As a result, you should see a change in file size.

While we can’t tell you exactly how much this will reduce your file size since each presentation will be different, it’s worth a shot.

As we mentioned earlier, a PPTX file is a compressed file (which is why the size is much smaller than an old-school PPT file). This means you can open it with a tool such as 7-Zip or WinRar, extract all the files from your PPTX, add them to a compressed archive, and then rename the archive to a PPTX file extension.

We had some issues here, though.

In Rob’s testing with his Word document, it successfully reduced the size of the file from 721 KB to 72 KB. However, it corrupted the file in the process. In my testing with my 2,614 KB file, it didn’t corrupt it, but it only reduced it to 2,594KB—a total of only 20 KB. We’re unsure what’s at play here, so if you want to give this a go, be sure to have a backup copy of your file before doing so.

That’s all the tips we've got for reducing the size of your PowerPoint presentation. We’re always looking for new and interesting ways to reduce the size of our files, so if you have any tips, let us know in the comment section, and we’ll be happy to test them out!

Compress PPT Files

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10 Ways to Compress PowerPoint Presentations to Reduce File Size

10 Strategies to Compress or Reduce the Size of Large PowerPoint Presentations

by Avantix Learning Team | Updated September 21, 2023

Applies to: Microsoft ®  PowerPoint ® 2013, 2016, 2019 and 365 (Windows)

You can compress or reduce the size of large PowerPoint presentations in several ways. The most common strategy to reduce the size of a PowerPoint file is to compress pictures, video and audio. However, you can also use other methods to make files smaller including saving media and PowerPoint files in other formats and converting or removing embedded objects.

In this article, we'll look at 10 ways to compress or reduce the size of a PowerPoint presentation:

• Compress pictures
• Insert pictures instead of copying and pasting
• Use smaller image files
• Convert images to a different file type
• Save a copy of images with artistic effects
• Compress audio and video
• Link to audio or video files
• Convert Excel charts and other embedded objects
• Save a copy of large PowerPoint files
• Save a copy in PDF format

Note: Buttons and Ribbon tabs may display in a different way (with or without text) depending on your version of PowerPoint, the size of your screen and your Control Panel settings. For PowerPoint 365 users, Ribbon tabs may appear with different names. For example, the Picture Tools Format tab may appear as Picture Format.

To view file size in PowerPoint:

• Click the File tab in the Ribbon.
• Click Info. In the Properties area, file size is listed beside Size.

Once you've completed the following strategies, close and save the PowerPoint file, reopen it and check the file size again. You can also view file size in Windows 10 File Explorer or Windows Explorer in older versions of Windows.

Recommended article : How to Embed a YouTube Video in PowerPoint

Do you want to learn more about PowerPoint?  Check out our virtual classroom or live classroom  PowerPoint courses >

1. Compress pictures

One of the most common ways to reduce file size is to compress one or all of the pictures in your PowerPoint file. You may want to try this with one picture at a time to be sure you are satisfied with the result after compression.

To compress a picture:

• In Normal View, select a picture on image on a slide.
• Click the Picture Tools Format or Format Picture tab in the Ribbon.
• In the Adjust group, click Compress Pictures. A dialog box appears.
• Select the check box to Apply only to this picture if you want to compress only the current picture or uncheck this option if you wish to compress all pictures in the presentation.
• Select the check box to Delete cropped areas of pictures if you have cropped images and want to permanently delete the areas you have removed by cropping.
• Choose the desired document resolution.

Don't forget to check pictures in Slide Master View (click the View tab in the Ribbon and then click Slide Master) as you may want to compress or delete those images as well.

Also, be sure to check image(s) after you compress them to be sure to are satisfied with the quality of the image(s). If you create a copy of the presentation before compressing the image(s), you can revert to the original if necessary.

2. Insert pictures instead of copying and pasting

It's best to insert pictures, rather than copying and pasting (or dragging and dropping) into the PowerPoint file. When you copy and paste (or drag and drop) an image into a presentation, it can lose compression, change file type and also bring in other data that can increase file size.

To insert a picture onto a PowerPoint slide:

• In Normal View, display the slide where you want to insert a picture.
• Click the Insert tab in the Ribbon and click Pictures (2013 and later versions) or Picture (2010). You can also click the Pictures or Picture icon in a placeholder on a slide. A dialog box appears.
• Navigate to the location of the picture.
• Select the picture and click Insert or double-click the picture.

You also have the option of linking to a picture file by clicking the arrow beside Insert in the Insert Picture dialog box and then choosing Link to File. However, the picture is not actually "in" the file (which reduces file size) and if you email the document, the pictures will not be included. If you use this strategy, it's best to copy the picture to the same folder as the PowerPoint presentation and be sure to bring the entire folder with you when you deliver the presentation.

3. Use smaller image files

It's best to insert pictures in smaller sizes to reduce the size of your PowerPoint files. For example, if you are inserting pictures from a phone taken at a high resolution, this will result in larger PowerPoint decks. Create, save or send images at a lower resolution and insert the lower resolution images into your PowerPoint files.

If you're using stock images, select images at the lowest resolution (at the quality level you require). You can also open an image in an image editing program (such as Microsoft Picture Manager or Adobe Photoshop) and then save it at a lower resolution.

In PowerPoint 365, one of the biggest culprits causing inflated file size is 3D models. Although 3D models are not inserted as pictures but rather as 3D models, they are images. One 3D model we inserted took up 17 MB of space. You can't compress 3D models like other types of images so you may need to delete 3D models or use a picture instead of a 3D model if file size is an issue.

4. Convert images to a different file type

Prior to inserting an image in PowerPoint, you can open it in an image editing program (such as Microsoft Picture Manager or Adobe Photoshop) and then use Save As to save the image in another format.

The format that will result in the smallest size is usually JPEG (Joint Photographic Experts Group format) or JPG. The JPEG compression algorithm significantly reduces the file size of images.

You can also save images in PowerPoint in different formats:

• Right-click the picture. A drop-down menu appears.
• Select Save As Picture. A dialog box appears.
• Navigate to the folder where you want to save the image.
• Enter a name for the file and select a format such as JPG or PNG.
• Click Save.
• In the PowerPoint presentation, delete the original image.
• Click Insert and then click Picture(s).
• Navigate to the location with the image you saved.
• Double-click the image.

5. Save a copy of images with artistic effects

When you apply an artistic effect to an image, PowerPoint retains two copies of the image (the original and a copy with the artistic effects). This allows the user to reset the image but can significantly increase file size. Compressing pictures also doesn't normally have any effect on images where you have applied artistic effects.

If you have applied an artistic effect (such as blur) to an image, you can reduce file size using the following method:

• Right-click the image with the artistic effect. A drop-down menu appears.
• Enter a name and select a file type (usually JPG or PNG).
• In the PowerPoint presentation, delete the image with the artistic effect.
• Navigate to the location with the image you saved with the artistic effect.

6. Compress audio and video

In 2010 and later versions of PowerPoint, audio and video files are copied into presentations rather than linked to the original files. You can improve playback performance and reduce PowerPoint file size by compressing audio and video files in your presentation.

Files can be compressed at different quality levels.

In PowerPoint 2013 and 2016, you can compress to the following quality levels:

• Presentation Quality – select this option to save space but maintain overall audio and video quality.
• Internet Quality – select this option and quality will be comparable to media which is streamed over the web.
• Low Quality – select this option if space is limited, such as when you are sending presentations via e-mail.

In PowerPoint 2019 and 365, you can compress to the following quality levels:

• Full HD (1080p) – select this option to save space while maintaining overall audio and video quality.
• HD (720p) – select this option to save space and the quality will be comparable to media which is streamed over the Internet.
• Standard (480p) – select this option when space is limited, such as when you are sending presentations via e-mail.

The following compression options appear in PowerPoint 2019 or 365:

Note: Some older video file formats may not compress or export properly. Embedded subtitles and alternate audio tracks will be lost in the compression process.

To compress media in PowerPoint:

• Open the presentation that contains the audio or video files you want to compress.
• Save a copy of the presentation so you can retain a copy of the file with the original media.
• In the copy, click the File tab in the Ribbon.
• Click Info.
• In the Media Size and Performance area, click Compress Media. A dialog box appears.
• Select the desired compression option. A dialog box appears indicating that media compression is in progress. PowerPoint will indicate how much space is saved.
• When compression is complete, click Close.

7. Link to audio or video files

You also have the option of linking to audio or video files. When you insert an audio or video file, click the arrow beside Insert in the Insert dialog box and then choose Link to File. Linked audio or video is not actually "in" the presentation (which reduces file size) and if you email the presentation, the media files will not be included if you have linked to audio or video files. Linking was the default behavior in PowerPoint 2007 and earlier versions for video and larger audio files.

If you choose to link to audio or video files, t's best to copy the media files to the same folder as the PowerPoint presentation and be sure to bring the entire folder with you when you deliver the presentation.

Note: You cannot apply certain types of formatting to linked video files.

8. Convert Excel charts and other embedded objects

Embedded objects such as Excel charts or worksheets can also increase file size. If you convert embedded objects to images, it can impact the size or your presentation. You can also reduce file size by breaking links to Excel files.

If you want to convert embedded objects into pictures, you can ungroup them or cut and paste them back into PowerPoint.

To ungroup an object:

• Select the chart or embedded object.
• Click the Format tab in the Ribbon. This tab may appear as Drawing Tools Format, Drawing Format or Shape Format.
• Select Group and then Ungroup. A dialog box appears asking if you want to convert the object to a PowerPoint object.

To cut an object and paste it back into a presentation as a picture:

• Select the embedded chart or object.
• Press Ctrl + X to cut it.
• Click the Home tab in the Ribbon.
• Click the arrow below Paste to display the drop-down menu and then choose Paste Special.
• Select an image type (such as JPEG) and click OK.

If you have links to Excel files, you can reduce file size using Edit Links to Files. Check out How to Break, Update or Change Links to Excel Charts or Worksheets in PowerPoint for more information on how to break links.

9. Save a copy of large PowerPoint files

It's a good idea to save a copy of a large PowerPoint files periodically using Save As and give the file a different name (i.e. Sales Presentation and the date). If you save a copy using Save As, version history and some editing data is removed during the process and this will reduce file size. This can also help avoid corrupted files.

To save a copy of a PowerPoint presentation:

• Choose Save As. If necessary, click Options or More Options. A dialog box appears.
• Navigate to the desired location.
• Enter a new name for the presentation.

10. Save a copy in PDF format

It's also common to save a copy of a presentation as a PDF (portable document format) file to reduce the size and then share it with others. You can compress images during the process.

To save a PowerPoint presentation as a PDF (and compress images):

• Choose Save As and then click Options or More Options if necessary. A dialog box appears.
• Navigate to the desired location and enter a name for the file. You can use the same name since the extension will be different (PDF).
• Under File Type, select PDF.
• Click Tools on the bottom right of the dialog box. A drop-down menu appears.
• Select Compress Pictures. A dialog box appears.
• Click the desired compression option.

Large file size is a common problem in PowerPoint and you can use these strategies to reduce the size of your PowerPoint presentations. Compressing the size of your decks should also help to improve speed and avoid crashes.

This article was originally published on November 6, 2016 and has been updated for clarity and content.

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Blog > Compress PowerPoint to reduce the file size

Compress PowerPoint to reduce the file size

02.12.20   •  #powerpointtips.

Sometimes, the file size of your PowerPoint presentation can get very big. In some cases, that can be annoying, e.g. when trying to send the slides via email, but not being able to do so because the file is too large. Usually, pictures and videos are the reason why presentations become too big. The good news are that you can easily compress pictures and embedded media files by following the steps listed below.

Compress images

Compress videos and audios.

• Convert PPT into a PDF file
• Get rid of 3D-models

Compress PPT as ZIP- file

PowerPoint offers the option to compress all images at once or choose single pictures to reduce their file size. Keep in mind, that compressing an image will automatically reduce its quality as well. If you don't need to reduce the file size, better use the highest quality resolution as possible.

There are two ways to compress images within your PPT file which nearly work the same way:

Compress selected pictures

• Select the image you want to compress or any picture if you wish to reduce the size of all graphics
• Navigate to the Picture Tools Format tab and select Compress Pictures

• A new menu pops up. Choose your compression options and make sure to check "Delete cropped areas of pictures" and uncheck "Apply only to this picture" (if you want to compress all images)
• High fidelity: preserves quality of the original picture
• HD (330 ppi): good quality for high-definition (HD) displays
• Print (220 ppi): excellent quality on most printers and screens
• Web (150 ppi): good for web pages and projectors
• E-mail (96 ppi): minimize document size for sharing
• Use default resolution

Compress all images while saving the PPT file

• Open your presentation. Go to File in the PowerPoint menu
• Click Save as and then Browse
• In the window that opens, click on Tools (right beside Save )
• Select Compress Pictures and choose the resolution you need To save even more space, you can additionally choose Delete cropped areas of pictures to remove the parts of pictures which you cropped in PowerPoint.
• Click OK and then Save

Video and audio files can increase your PPT size a lot. It's a good idea to compress those if you want to make some space. Some PowerPoint versions make it possible to decrease the media size in PPT but if this option is missing in your program, online video compressors are the solution.

Compress videos and audios in PPT

• Go to File in the PowerPoint menu
• Open the Compress media drop down
• Choose a compression file size. Don't reduce the quality too much and check if the appearance of your media doesn't look too grainy on the actual projector you will be presenting on

Online video compressor

There are plenty of online video compressors which you can use to reduce the video size in advance. For example, the website FreeConvert makes it easy to decrease the file size without having to download anything. This way you can integrate a smaller media file into PPT.

Links instead of videos

Instead of importing a video to your PPT slides, including a link to your PowerPoint presentation can save a lot of space. If your video is somewhere on YouTube or other online video-sharing platforms, include a link and use it when you're presenting. But notice: a link can only be used, if you're connected with wifi. Watching videos online, can take time and a bad connection might give you some unwanted breaks during your presentation. In this case, saving the video on your disk and opening it separately can save time and still reduce the size of the PPT.

Convert PPT to PDF

By converting a PowerPoint file into a PDF, the size will reduce automatically. During the process, images get compressed and some media (audio, videos, 3D models..) get removed. If you want to change the PowerPoint slides at all time, this method might not be the right one for you, as PDF files can't get edited the way a PowerPoint can. Hence, converting PPT into PDF only makes sense if your presentation will work as a handout and if the PDF files options are enough for you.

• Click Export
• Hit the Create PDF/XPS button
• Choose a location in which you want to save your PDF file
• Click Publish

Get rid of 3D models

The Office 365 subscription makes it possible to add 3D models to your PowerPoint slides. Nevertheless, those media require much space since they transport a lot of information. In order to minimize the PPT file, exchanging the 3D model with a normal image will easily reduce the size of your PowerPoint file.

If you need to share your PPT with someone, a ZIP- file format might help you to reduce the size of the PowerPoint. Even though, this method can save some place temporally, it might not be enough to send it via email. Uploading it to file-sharing platforms, such as GoogleDrive, DropBox, OneDrive or other websites and sharing its link to download the PPT, can be the better option. (Using an USB for sharing the presentation without the need to decompress anything would be the best solution)

Here's how to convert a PPT into a ZIP- file format:

• Select the file you want to minimize in the File Explorer
• Right-Click the file and hit Send to
• Choose the Compressed (zipped) folder option

If you want to decompress a ZIP- file into its original PowerPoint format:

• Right-Click on your ZIP- folder
• Select Extract All... or the similar operation of your program
• Choose a File Location to extract your file to, or extract it at the place you are currently at

How can I reduce the size of a PowerPoint file?

There are several ways to reduce the file size of a PowerPoint. You can compress images, videos and audios, convert your presentation into a PDF file, get rid of 3D models or compress the PowerPoint as a ZIP-file. We explained for you how all of this works in our blog.

How do I compress a video in PowerPoint?

To compress videos in PowerPoint, go to "File" in the PowerPoint menu and then click on "Info". Then open the drop-down menu "Compress media" and select the size of the compression file. Be careful not to reduce the quality too much and check that the quality of your video on the projector you will be presenting on is not too bad.

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Pia works in Marketing as a graphic designer and writer at SlideLizard. She uses her vivid imagination and creativity to produce good content.

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Home Blog PowerPoint Tutorials How to Compress PowerPoint Presentations

How to Compress PowerPoint Presentations

Many users, when sharing PowerPoint files via email, can end up realizing that the file is too big to be sent via their email service provider because of its excessive file size. While there are many third-party apps that enable sending large files via sharing links, not only can they be less secure to use for confidential documents, but the files might take a while to download by the recipient due to the heavy file size. therefore, Compressing a PowerPoint presentation can help you avoid such issues.

Compress a PowerPoint Presentation File

There are different methods by which you can compress a PowerPoint file and elements within the file to reduce the file size and make your slide deck more manageable.

1.  Compress Images in PowerPoint

The most common method to reduce the file size of a PowerPoint presentation is to compress slide images. This method is also quite useful if you’re wondering how to compress a ppt file for email since it provides the option to reduce the images down to a very low resolution of 96 PPI, which is usually sufficient to make the presentation small enough for an email attachment.

To compress one or more images in PowerPoint, select an image from the presentation, go to the Picture Format tab, and select Compress Picture from the Adjust menu.

From the dialog box that appears, you can choose various compression options. If you want only to compress the selected image, check Apply only to this picture checkbox. The compression options available from the given dialog box can be used to reduce the size of the current or all images in the presentation file for print (220 PPI), web (150 PPI), and email (96 PPI), or you can choose the default resolution.

2. Compress Video and Audio in PowerPoint

Video and audio files can take up a lot of space and make PowerPoint presentations difficult to manage due to their large file size. If you have media files added to PowerPoint that are heavy, your presentation might also lag in SlideShow mode. To compress video and audio files in PowerPoint, go to File > Info > Compress Media . Select a lower resolution of the media files from the drop-down menu to reduce their file size.

This will reduce the file size for video and audio files, with information regarding how much the files were compressed.

You can play to preview the media files to ensure the quality of the converted media files is satisfactory. Suppose you aren’t satisfied with the compression quality and reduced file size. In that case, you can also compress the media files using third-party tools, including online converters like CloudConvert and ZamZar or media file conversion apps like HandBrake, Xilisoft audio/video converter, Freemake audio/video converter, etc.

3. Remove Heavy Graphics and Slide Elements

Another easy method to compress PowerPoint is to remove unwanted elements to reduce the file size. You can either do this directly from slides or edit the layouts of the deck via View > Slide Master .

4. Replace Media Files with Links and Embedded Content

You can also replace certain files that might be making your slides heavy. Embedding the media files directly via online sources like YouTube or by adding links to media instead of embedding files in your presentation will significantly reduce file size.

5. Convert PowerPoint File to Compress File Size

If you don’t need to present your slides as a PowerPoint file, Converting PowerPoint presentations to a different format, such as PDF, can compress the file size. This will also remove media files such as audio and video files that you can instead add as a clickable link for the recipient prior to conversion.

6. Compress a PowerPoint File using a File Compression Format

To share a PowerPoint file online in a compressed format, you can convert it to a ZIP file or use a number of formats supported by your operating system or third-party apps such as RAR, 7z, GZIP, TAR, XZ, WIM, etc. The compression feature is often integrated via the right-click context menu or long tap for mobile operating systems.

Some of the most famous tools known to provide a high file compression ratio and various security features for file compression include 7-Zip, WinRAR, WinZIP, PeaZip, etc.

Compressing PowerPoint files can have pros and cons, including loss of media quality or inability of the recipient to open the file if it’s in a compression format that requires a specific app that he/she might not have. Therefore, you should pick a mode of compression that is convenient enough for you and the recipient of the file.

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Compressors

Nov 19, 2014

6.17k likes | 12.64k Views

Compressors. What is a Compressor? A mechanical device that increases the pressure of a gas by reducing its volume . Similar to a pump – Increases the pressure on a fluid and transport it through a pipe. What is key difference between a Fluid and a Gas?

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• rotating mechanism
• positive displacement
• hermetically sealed
• reciprocating compressor works
• low pressure gas enters

Presentation Transcript

Compressors • What is a Compressor? • A mechanical device that increases the pressure of a gas by reducing its volume. • Similar to a pump – Increases the pressure on a fluid and transport it through a pipe. • What is key difference between a Fluid and a Gas? • Compressibility – a gas is compressible • What happens to gas volume as it is compressed? • Decreases • What happens to the Temperature of the Gas as it is compressed? • Increases

Compressors • Compressors are classified by how they work • Two Categories of Compressors • Positive Displacement • Dynamic • What is a Positive Displacement Compressor? • A compressor that confines successive volumes of gas within a closed space in which the pressure of the gas is increased as the volume of the closed space is decreased. • Intermittent Flow • What is a Dynamic Compressor? • A compressor using a rotating mechanism to add velocity and pressure to gas. • Continuous Flow

Compressors • Two types of Positive Displacement Compressors: • Reciprocating • Rotary • Two Types of Dynamic Compressors • Centrifugal • Axial

Compressors • Reciprocating Compressors • How does it work? • Piston movement in a cylinder connected to a rod and crankshaft • Downward piston motion, low pressure gas enters the chamber • Upward piston motion, gas is compressed and exits the chamber • Video

Compressors • Reciprocating Compressors • High Horsepower Applications • Common in natural gas transmission lines. • Processes for high pressure delivery of gasses • Air Conditioning Compressors • Some manufactures (Frigidaire™) use rotary compressors • AC Compressors (and other small appliance applications) are Hermetic or Semi-Hermetic

Compressors • Hermetically Sealed and Semi Hermetically Sealed Compressors • The compressor and motor driving the compressor are integrated, and operate within the pressurized gas envelope of the system. • The motor is designed to operate and be cooled by the gas or vapor being compressed. • The hermetic uses a one-piece welded steel casing that cannot be opened for repair. • If the hermetic fails it is simply replaced with an entire new unit. • A semi-hermetic uses a large cast metal shell with gasketed covers that can be opened to replace motor and pump components. • The primary advantage of a hermetic and semi-hermetic is that there is no route for the gas to leak out of the system. • Open compressors rely on either natural leather or synthetic rubber seals to retain the internal pressure • Require a lubricant such as oil to retain their sealing properties

Compressors • Rotary Compressors • How do they it work? • When a rotating mechanism spins past the inlet valve, it creates a vacuum. • The fluid flows out of the valve behind it, filling the vacuum. • As it approaches the outlet valve, the chamber shrinks, creating more pressure on the fluid. • The fluid has nowhere to go but out of the outlet valve, so it shoots out of it. • Then the rotating mechanism continues on to draw more fluid at the inlet valve. • How it works Video

Compressors • Common Types of Rotary Compressors • Screw • Vane • Scroll • Screw • Two meshing helix screws • Rotors • Compact and smooth running • 2 types - Oil Free and Oil Flooded • Oil Free – No assistance from oil to cool and assist in sealing . • Oil Flooded – Oil injected to aid in sealing and provide cooling. • Separator downstream to capture the oil

Compressors • Vane Compressors • Vane housing on a off centered shaft • Vanes slide in an out always making contact with the compressor walls • Gas enters in the largest opening • Exits the smallest • Good for low pressure applications • Efficient • Heat controlled by oil injection

Compressors • Scroll Compressor • How it works • 2 Spirals • 1 stationary, 1 orbits without rotating • 1st orbit entraps inlet gas • Subsequent orbits compresses gas and exited out the center • Generally 2-3 orbits for a full cycle • Video • Advantages • Compact • Steady flow • Low energy use • Quiet • Smooth operation

Compressors • What is a Dynamic Compressor? • A compressor using a rotating mechanism to add velocity and pressure to gas. • Continuous Flow • What are the Two Types of Dynamic Compressors? • Centrifugal • Axial

Compressors • Centrifugal Compressors • Rotating disk (impeller) forces gas to the rim of the impeller, increasing velocity • The diffuser converts the velocity energy to pressure energy. • Primarily used for continuous, stationary service in industries such as refineries, chemical plants and snow making operations • Single Stage and Multi-Stage Compressors • How a Centrifugal Compressor Works

Compressors • Impeller • Most critical part of a centrifugal compressor • Compressor performance determined by impeller: • Size • Shape • Speed • 3 types of Impellers • Closed • Most common • Shroud covering both sides of the blade • Center eye hole for gas to enter • Used in Multi-stage compressors • Semi –open • Open

Compressors • Multi-Stage Compressors • Diaphragm • Specially designed casing wall separating the stages • Gas passes through the difuser • Passes through the return channel in the diaphragm • Controlling Axial Load on the Shaft • Bearing Review • Thrust Bearing

Compressors • Axial Compressors • Gas flows parallel to the axis of rotation • Unlike centrifugal that has radial components • Has rotating and stationary components • Rotating airfoil – rotor • Stationary airfoil – stator • Similar number of these on a shaft Video

Compressors • Axial Compressors • High Volume • High Efficiency • High Cost • Common Uses • Gas Turbines • Jet engines • Power stations • Nickname – “Superchargers”

Homework • What is a Compressor? • What happens to the temperature and the volume of a gas as it is compressed? • What are the 2 categories of Compressors? • Explain the difference between a positive displacement and radial compressor. • Explain how a reciprocating compressor works. • Describe a Hermetically sealed compressor. • Explain how a rotary compressor works. • Describe how a scroll compressor works. • Explain how a multi stage compressor works. • What type of compressor is found on jet aircraft?

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Choose Files:

Compression settings:, output files:.

To compress all output files in a ZIP file, click " " icon on the right, then click "Add to ZIP". To download one single file, simply right-click on file link and click "Save link as...".

How to compress PPT files:

Set image quality first. Image quality value can be 1 (lowest image quality and highest compression) to 100 (best quality but least effective compression).

Drag multiple PowerPoint files to the "Choose Files" section. File extension name can be .ppt or .pptx. Each PowerPoint file size can be up to 40 MB.

Compress Files

The batch compression automatically starts when files are uploaded. Please be patient while files are uploading or compressing.

Output Files

The output files will be listed in the "Output Files" section. To compress all output files in a ZIP file, click " " icon on the right, then click "Add to ZIP". You can right-click on file name and click "Save link as..." to save the file. The output files will be automatically deleted on our server in two hours, so please download them to your computer or save them to online storage services such as Google Drive or Dropbox as soon as possible.

Unblock Files (if needed)

You may need to unblock the PowerPoint files if your Microsoft PowerPoint software can't open them. To unblock a file on Windows, right-click on the file and open "Properties". Under the General tab, towards the bottom you will see "Unblock" button or checkbox next to "Security: This file came from another computer and might be blocked to help protect this computer". Click on it, then click "Apply/OK".

The big change in PowerPoint 2007 was that the stable binary file format of 97-2003 (.ppt files) was replaced as the default by a new zipped XML-based Office Open XML format (.pptx files). Microsoft's explanation of the benefits of the change included: smaller file sizes, up to 75% smaller than comparable binary documents; security, through being able to identify and exclude executable macros and personal data; less chance to be corrupted than binary formats; and easier interoperability for exchanging data among Microsoft and other business applications, all while maintaining backward compatibility.

We can't find any open-source projects to compress PowerPoint presentations, therefore we wrote all the source codes from scratch by ourselves. This PowerPoint compressor compresses images in PowerPoint presentation to reduce file size.

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How to compress PowerPoint files.

Want to save space on your computer? Learn how to compress a PowerPoint to save space and make your presentation easier to share.

Need to learn how to compress Microsoft PowerPoint files but not sure where to begin? Whether you want to save space on your device or avoid file size issues in an email, compressing your PowerPoint is a great way to keep file sizes to a minimum and make your presentation easier to store and manage.

When is compressing a PowerPoint file beneficial?

While a PowerPoint in its original quality is great for presenting, it may not always be the easiest to share and store on your computer. Compressing PowerPoint files is a great way to save space while keeping your hard work.

Here are a few reasons you may want to compress your PowerPoint:

• Improve shareability over email. Most email platforms limit the file sizes that you can share. If your Powerpoint contains a lot of content, especially photos and videos, it may be more difficult to share over email. Compressing the PowerPoint ensures that the same content is shared, just as a smaller file size.
• Have more storage space on your computer. By compressing your PowerPoint file, you leave room for more important documents to be stored on your computer.
• Boost productivity. By spending less time waiting for a file to upload, you can place your attention on other important tasks.

Steps: How to compress a PowerPoint file.

There are a few different methods you can try within the PowerPoint application and outside of it to reduce your PowerPoint file size and easily be able to share and save your content.

You can reduce the size and quality of any images in the presentation, reduce audio and video content, compress the PowerPoint as a PDF, compress it as a zip file, or swap any 3D models with static images.

Compress a PowerPoint file by reducing the size and quality of your images.

While there’s no way to compress the entire file in PowerPoint, you can reduce the size and quality of all the images to reduce the whole presentation’s size.

Instead of going through your complete presentation and editing your images one by one (which you can do if you want), there’s an easy way to compress all your image files at once:

• Open the presentation in PowerPoint.
• Click File on the top toolbar and choose Options > Advanced.
• Check “Discard editing data.”
• Uncheck “Do not compress images in file.”
• Select 150 PPI or lower in the Default resolution dropdown menu.

These steps will reduce the file size of all the images in your presentation, effectively compressing the entire PowerPoint. The more pictures you have, the more it’ll compress the file.

Compress a PowerPoint file by reducing the size of audio and video files.

Audio and video content takes up a lot of storage space in a presentation.

You can reduce the size of audio and video files by following these steps:

• Click on the File tab in the upper-left corner.
• Select Info from the dropdown menu.
• Click Compress Media. There are three options for compression.
• Choose your compression option. Click Close once the file is done compressing.

Ensure the file is compressed to your liking. If the compression does not meet your standards, adjust the settings as needed.

Compress a PowerPoint file as a PDF.

An easier way to compress a PowerPoint is to first convert the PPT to a PDF using an online PDF editor like Adobe Acrobat online services. PDF files are smaller and easier to share than PowerPoints.

To convert your PowerPoint to a PDF, follow these easy steps:

• Visit the online PDF converter tool.
• Upload the PowerPoint you want to convert.
• Let the software do its magic.
• Download your new PDF file.

The PDF file should be much smaller than the original PowerPoint, making it easy to store and share. If the file size is still too big, you can reduce it even further by compressing the PDF online .

Compress PowerPoint files as a ZIP file.

By changing the PowerPoint to a ZIP file, the whole presentation size will be reduced.

Use these steps to transform your PowerPoint into a ZIP file:

• Click File in the upper-left corner.
• Choose the Open option.
• Right-click the project you wish to compress. Additional options will appear.
• Choose “Send to” and more options will appear.
• Find the option named “Compressed (zipped) folder.” Choose this option to compress the file.

Compressing PPT files on macOS and Windows.

In the macOS PowerPoint, you can reduce the file size of images but not music or videos.

Here are the steps to compress your PowerPoint on a Mac:

• In PowerPoint, click File. If you only want to compress certain images, select them before you click File.
• From the dropdown menu, click Compress Pictures.
• Printing — highest quality.
• Viewing on Screen — reduces image quality by 30%.
• Sending in an email message — compresses images by another 30% or so.
• Choose whether or not you’d like to delete portions of the photos that have been cropped out. By doing this, you can reduce the file size.
• Decide whether you want to compress every photo in the slideshow or only the ones you already selected. Click OK when done.

For Windows, follow these instructions:

• Click File and make sure Info is selected in the left sidebar.
• Click Compress Media. Depending on the version of PowerPoint, the button will either say Multimedia or Media Size and Performance.
• Choose the highest quality option if you want to maintain the presentation quality for in-person presentations.
• Choose the middle option for a presentation best suited for the internet.
• Choose the lowest quality option for the highest compression so you can easily share the PowerPoint over email.

Tips on how to reduce PowerPoint file size.

There are a few methods that can help reduce your PowerPoint file size.

• Analyze image quality. Presenting high-quality images, audio files, and videos can create a more engaging experience for your audience. Each time you compress images, double-check to be sure they still look presentation-ready.
• Replace 3D models. While 3D models are a unique component of presentations, they take up more storage space. Opting for similar static images may be the best option for sharing your presentation.
• Convert images to JPEG. If your photos are in the PNG format, you may want to make them JPEGs. You can easily do this in PowerPoint by right-clicking the pictures and then choosing “Save as Picture.” From there, under “Save as Type:,” choose the option named JPEG. Save, and you’re done.

More resources to work with your files.

After compressing PowerPoint files, here are additional ways to work with your documents:

• Learn two ways to convert a PDF to Google Slides for presentation.
• Discover how to delete a slide in PowerPoint .
• Learn how to redline documents in Word .
• Discover how to convert a PPT to Google Slides .

Discover what more you can do with Acrobat online services to simplify editing and managing your PowerPoint and PDF files.

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How to Compress a PowerPoint

• PowerPoint Tutorials
• Miscellaneous
• April 22, 2019

Before you go to the effort of compressing your PowerPoint presentation, ask yourself if you even need to bother?

If you are not having trouble sharing your presentation, or you don’t need to email it to anyone (maybe you can share it on a USB instead), don’t worry about how large your presentation is.

If you’ve added lots of images, videos, graphics, and 3D models, your PowerPoint presentation might be huge. But so what?

Only follow these steps if you find that your presentation is becoming unwieldy or too big to share. And then, only do the minimum required to get to a functional state.

Table of Contents

[watch] 6 ways to compress a powerpoint presentation.

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1. Compress Images in PowerPoint

If you have lots of images in your presentation, you can save a lot of space by compressing them. This is a fast and uncomplicated way to reduce your PowerPoint file size.

You can also save a lot of file space in PowerPoint by converting your PNG images into JPEG images. To learn how to do that before you compress your images, read our guide here .

Notice in the picture above how much space was saved using the different compression options.

The HD (96 ppi) compressed file is 17x smaller than the original presentation. Just make sure when you compress your images that you pay attention to their quality.  The more you compress an image in PowerPoint, the more quality you will lose.

Ideally you want to use the HIGHEST quality resolution as possible, especially if you are presenting on a large overhead projector.

To compress your images in PowerPoint, follow these steps.

1. Open the Picture Format tab

Select a picture in PowerPoint to open the Picture Format tab in your Ribbon and select it.

The Picture Format tab is where all the commands and features related to working with and editing images are located.

For example, to see how to turn an image into a black and white drawing using the Artistic Effect features in PowerPoint, read our guide here .

If you do not see the Picture Format tab in your PowerPoint Ribbon, it means you have not selected an image or photo to work with. The Picture Format tab is contextual and will open only once you have selected an image or picture to work with.

2. Select the Compress Pictures command

Inside the Picture Format tab, find and select the Compress Pictures command.

Depending on your screen resolution and the size of your computer monitor, this command might appear as just an icon.

Either way, the icon should be to the right of the Transparency command.

3. Choose your compression options

You have two main compression options to choose from:

Apply only to this picture : This determines if the resolution you pick is applied only to the picture you have selected or to all the pictures within your presentation.

Most often, your images will require different compression resolutions. That’s why I recommend keeping the Apply only to this picture option selected and working your way through the images in your presentation one by one.

If you know that you want all of the pictures in your presentation compressed to a specific resolution, you can choose to unselect this option.

Delete cropped areas of pictures: Selecting this option removes any cropped areas in your pictures as part of the compression process. This will dramatically decrease the size of any images you have cropped.

However, please note that once you do this, you lose all the parts of the images that you cropped out. This means that you won’t be able to return to the original image and adjust the cropping.

To expand your knowledge and learn how to crop your pictures in PowerPoint to save additional space before you compress them, read our guide here .

4. Choose your resolution

Next, choose the resolution you want your image(s) compressed to. The smaller the resolution, the smaller the size of the images and the smaller the size of your presentation.

The question is, what is the best resolution to pick? This depends on how you plan to give your presentation.

If you’re presenting on a large overhead projector, I recommend choosing a higher resolution like HD (330 ppi) so that all your images are sharp and clear. If you are printing or just showing someone your presentation on your laptop, then Print (220 ppi) is fine.

I don’t recommend going much smaller than these two resolutions as the overall quality of your images will decrease rapidly.

For more help choosing the right resolution when compressing images in PowerPoint, see our guide here .

5. Click OK

Once you have made your compression choices and picked a resolution, click OK and PowerPoint will compress your image(s) for you.

Once PowerPoint finishes compressing your images, I recommend reviewing the quality of the compression to make sure everything looks okay. If you find that your image looks grainy, hit Ctrl+Z to undo and choose a higher resolution.

2. Compress Videos in PowerPoint

Videos and media files (like audio files) can be huge!

So if you have a video or other media files in your presentation, compressing them is another fast way to reduce your PowerPoint file size.  Or better yet, if you realize you are not using a specific video (or rarely use it), remove it.

Using the default video compression options in PowerPoint, I saw the following results, reducing my file size by over 6x.

To compress your videos and other media in PowerPoint, simply follow the following steps.

1. Select the File tab

Click the File tab to open the backstage view of PowerPoint.

Videos and other media are all compressed in the backstage view of PowerPoint, not in the Video Format tab like you might think.

2. Select the Info tab

Find and click the Info tab to access the Compress Media tools.

3. Open the Compress Media dropdown

Inside the Info tab and u nderneath Media Size and Performance, PowerPoint tells you the total size of the media files (video and audio) in your presentation.

Find and select the Compress Media command, which should be at the top of the Info tab. 

If you do not see the Compress Media command, that means that you don’t have any media that PowerPoint can compress.

You can only compress videos and other media inside your current PowerPoint presentation. 

If you have narrated your presentation using PowerPoint’s built-in Record Slide Show command, your narration videos and audio do not require compression. To learn how to narrate a PowerPoint using PowerPoint’s built-in Record Slide Show command, read our guide here .

4. Choose a compression file size

In the Compress Media dropdown, choose one of the three compression options for your videos and other media:

• Full HD (1080p)
• Standard (480p)

If you are not sure which compression option to choose, I recommend at least compressing using the Full HD (1080p) option. In my compression tests, the Full HD (1080p) reduced the size of my original video by half.

Full HD (1080p) works great for any overhead projector or monitor you will be presenting on. If you need to save more space, you can test out one of the smaller formats. But be careful. Just like when compressing images and photos, the more you compress your videos (or other media) the lower the quality of your video.

As a best practice when building presentations, use the highest compression rate you can without sacrificing the quality of the videos (or other media).

5. Wait as PowerPoint compresses your videos

After choosing a compression size, PowerPoint will begin compressing all the videos in your presentation. When it’s done, a dialog box will show you how much space you saved with each compressed video.

For example, for a raw video I inserted and compressed in PowerPoint, I saved 872.5 MB. That is A LOT and it allows me to share my presentation more easily.

To expand your knowledge and learn how to embed a video in PowerPoint (and learn how it is different than embedding a YouTube video), read our guide here .

3. Clean out the Master Views in PowerPoint

Before you worry about compressing any of your images or videos, see if you can reduce your file size by removing hidden and unused elements in your presentation.

One of the culprits of a large PowerPoint file size (especially if you don’t feel like you have that many slides in your presentation), is hidden graphics on one or more of the following masters in PowerPoint:

• Slide Master (most common)
• Handout Master
• Notes Master

It’s common to find excessively large graphics or things you can eliminate to reduce file size in your different master views. That said, you do not want to just delete anything you find there. That is because someone might have set them up for a reason in the first place. Double-check before you start deleting things, but this is a common way to cut down the size of your deck

A. Slide Master - Hidden graphics

To navigate to the Slide Master view to spot check your child slide layouts, simply:

• Navigate to the  View tab
• Select  Slide Master
• Spot check your  Child Slide layouts

Here you want to look at your Child Slide layouts and see if there are any with extremely large pictures or media files that you are not using.

Then you can decide whether to compress them (as mentioned above) or delete them.

You might also find a lot of duplicate  Child Slide  layouts that you can simply remove. This happens when people copy and paste between presentations that don’t have a consistent or well-built PowerPoint template. To expand your knowledge and learn how to create your own custom PowerPoint template from scratch, read our guide here .

B. Handout Master - Hidden graphics

To navigate to the Handout Master view of your presentation, simply:

• Select  Handout Master  in your Ribbon
• Spot check your  Handout Master

Here you are looking for excessively large company logos or graphics that you can compress or remove.

PowerPoint shapes such as rectangles, lines and text boxes are fine. Removing them will not impact the size of your presentation.

Formatting your  Handout Master is a fantastic way to create customized slide handouts of your presentation, but if there are excessively large graphics here, compressing or removing them can help you decrease the size of your presentation.

C. Notes Master - Hidden graphics

To navigate to the Notes Master view of your presentation, simply:

• Navigate to the  View Tab
• Select  Notes Master  in your Ribbon
• Spot check your Notes Master

If you find any excessively large images, or multi-media elements here, removing them will reduce your overall file size. You don’t have to worry about any shapes, lines, or text boxes (these will never increase the size of your presentation). You are looking for unnecessarily large graphics, or graphics that are placed outside of the Notes Master area (as those will never appear on your handouts anyway).

Formatting the Notes Master is a terrific way to create branded handouts for your speaker notes. However, if there are large graphics here that you are not using, compressing, or removing them can help reduce the size of your presentation.

To learn more about your Notes Master and how it affects the formatting and layout of your speaker notes in PowerPoint, read our guide here .

To expand your knowledge and learn how to professionally print your speaker notes in PowerPoint, read our guide here .

4. Swap out 3D Models and Other Media

If you have the Office 365 subscription ( check it out here ), you can now add 3D models and graphics into your presentations from the Insert Tab, 3D Models dropdown.

• Click the Insert tab
• Open the 3D Models dropdown
• Select the location source for your 3D model

Below are examples of animated 3D models you can insert into PowerPoint. I’ve selected the rhinoceros.

These 3D models can be quite large and there is currently no way to compress them. Notice in the picture below how adding just one animated 3D model adds over 26 MB to the PowerPoint file.

So if you need to reduce the size of your presentation, try to replace any 3D models with a static image. For example, instead of using the 3D rhinoceros, use a picture of a rhinoceros instead.

Notice that the picture of the rhinoceros is 7x smaller than the 3D model on the left.

If you want to keep the 3D look of your model, you can also Copy ( Ctrl+C ) and Paste Special ( Ctrl+Alt+V ) your 3D model as a PNG image. That will retain the 3D look of the model in your presentation without its size. To expand your knowledge and learn more about the Paste Special shortcut (which is also the trick to pasting formatting in Excel), read our guide here .

5. Convert PowerPoint to PDF

If you don’t need to present using PowerPoint, instead of trying to compress your presentation, you can simply convert it to the PDF file format.

That’s because the PDF conversion process automatically compresses images and removes any videos, 3D models, etc.

To convert your presentation to the PDF file format, simply:

• Hit  F12  to open the  Save As dialog box
• Change the  File Type  to PDF
• Click  Save

Just be aware that not everything in your presentation will properly convert to the PDF file format. You will lose quite a few things, such as animations and transitions.  To learn all the ins and outs of converting a PowerPoint presentation into a PDF file format, read our guide here .

6. Compress PowerPoint as a ZIP File

As a last resort, you can also try to reduce the size of your presentation by compressing it into a ZIP file.

While this technique compresses everything in your presentation, it doesn’t always save you a ton of space.

For example, notice in the picture below how my file size has only been reduced by 4MB using this ZIP folder technique.

If you need to keep all of your videos, graphics, and 3D models as they are, this might be your best bet Just keep in mind that it might not save you a ton of space and you may be  better off using something like OneDrive, Google Drive or Dropbox.

How to create a compressed (zipped) folder

To compress your PowerPoint presentation into the ZIP file format, simply:

• In File Explorer,  Right-Click  your file
• Select  Send to
• Choose the  Compressed (zipped) folder  option

Selecting the Compressed (zipped) folder , PowerPoint compresses your presentation as much as possible. How much room it saves depends on what is in your presentation. If you have already compressed your images and other multi-media files, then you will not save much space.

Below you can see the dialog box showing you that your presentation is being compressed.

How to extract a compressed (zipped) folder

To decompress a zipped file, simply:

• Right-Click the zipped folder
• Select  Extract All…
• Choose a  File Location  to extract your folder to
• Click  Extract

Extracting your file turns your zip folder into a normal folder with your original PowerPoint file in it. Instead of just zipping your PowerPoint file, you can add additional files to a folder and ZIP the entire folder. In this way, you can reduce the overall file size of a number of files or documents you want to share with a client or colleague.

Compressing the different elements of your presentation is a great way to reduce your overall PowerPoint file size.

Just remember that compressing your PowerPoint presentations is an optional step. If you are not having any trouble sharing it with other people, don’t bother.

That’s because while reducing your file size can make it easier to share with others, it can also decrease the quality of the images and media.

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Reduce the size of your PPT files

How to compress ppt files.

First, you need to select an application from the available options and upload the PPT/PPTX file

Compress it

In the next step, you need to select the necessary settings and proceed to compress your image.

And finally, when everything is ready, you can download the file to your device and check it.

What is PPT

Microsoft Office PowerPoint (or simply PowerPoint) is the name of a special program designed to create and deliver presentations. PowerPoint was developed by Microsoft and since 1990 has been an integral part of the Microsoft Office suite. PowerPoint was originally developed for Macintosh computers, but later expanded to be used on the Microsoft Windows operating system. To share your presentation, you can record it in video format. This allows you to send it by e-mail, publish it on the Internet or save it to disk. When converting your presentation to a movie, you can add voice-overs, set the timing of the slide show, and even record your pointer movements. You can watch a presentation in this format without PowerPoint; it will play as a video file.

How PPT compression works

Information in PowerPoint is placed on separate sheets - slides. Each slide can have its own design and size. Information on a slide can be presented in the form of text, images, photos, videos. Each block of information on a slide can be animated. You can also apply animation effects to transitions between individual slides. If you paste pictures into slides using the clipboard (copy-paste), then you are doing it wrong. Use the standard image insertion function. Often, when using the insert method by CTRL + C / CTRL + V, the JPEG image is automatically converted to PNG or BMP format, which is much heavier in itself. Before embedding any image in your presentation, make sure that it does not need editing. Otherwise, first use any third-party editor (Photoshop, Gimp, Paint, etc.) to make edits and only then paste the final version.

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How to Compress a PowerPoint Presentation

Audio, video, and pictures add interactivity to your presentations, but they also add a lot of weight, which makes it difficult to share.

In this article, we’ll explain three ways to compress PPT files for the easy sharing and speedy playback of your presentation. Here are the ways to both compress your presentation with PowerPoint’s built-in features and with a compression app that helps you preserve all animations and effects.

If you have many pictures in your file, the first method is to compress all pictures quickly across the entire presentation right in PowerPoint. The second way is to compress video and other media in your presentation, also with a built-in PowerPoint tool. And the third and final way is to simply convert your presentation to HTML5 file format to reduce the size of the file.

Image Compression

1. Open a slide that contains images and select the picture you want to compress.

2. In the Format tab, click on Compress Pictures .

3. In the pop-up window, you can specify compression settings. If you want to compress all pictures in the presentation, uncheck Apply only to this picture .

How to Compress PPT Presentation, While Preserving Its Quality

If you will share your presentation online, send via email, or otherwise distribute it, PowerPoint’s built-in settings won’t be sufficient. That’s why we recommend that you convert the PowerPoint presentation to HTML5.

iSpring Converter Pro ensures that all the media resources included in your slides are tightly compressed but still look and sound just as crisp as they did in the original PowerPoint presentation. Despite making your presentation smaller, iSpring accurately re-creates all the animation and transition effects and makes them work in HTML5.

Unlike many other PowerPoint-to-HTML5 converters, iSpring creates a single .html file, which is a great advantage if you’re going to share your presentation.

Here’s how you can try out iSpring Converter and its compression features:

1. Download a free trial of iSpring Converter Pro and install it on your computer. When you open the app, it will appear like one more tab on your PowerPoint toolbar.

You can watch a video tutorial on how to convert a PowerPoint Presentation to HTML5 through file compression or skip to the article if you prefer reading.

2. Open your presentation and go to the iSpring Converter Pro tab. Click the Publish button.

3. In the My Computer tab, click For standard delivery next to Quality .

4. In the opened window, you can adjust the quality level for images, audio, and video. Note that the higher the quality of the media, the larger the size of the output files.

Compression Presets

With iSpring’s compression presets, it’s easy to save and quickly apply the same compression settings to similar projects. You can also configure your own quality settings and save them as a custom preset.

Images can be turned into HTML5 format with “Lossy” (JPEG only) or “Lossless”(PNG only) compression. “Lossy” is the most appropriate for photos and realistic images. This compression type allows a decrease in the image size up to 10+ times with insignificant quality loss. If you’re using diagrams, sketches, charts, or anything with crisp lines and/or shapes in your presentation, it’s better to apply “Lossless” compression, which converts images while maintaining the highest quality. 

Since a presentation usually contains various types of images, iSpring offers “Smart”  compression (JPEG and PNG). This unique option analyzes each image, automatically determines its type, and chooses the best way of saving it in HTML5 format. “Smart” compression optimizes the size of your presentation while still providing images of the highest quality.

Audio Compression

iSpring preserves the original audio quality by default. You can set a lower bitrate for a lower file size, but it will also affect the quality of the audio. (Obviously, a small change in bitrate will only be detectable to those with sensitive ears, but even a tin ear will notice a large decrease in bitrate.) 

Note: Forcing a higher bitrate than the source file will not increase the quality of the audio, as the source file only contains a given amount of digital information.

Video Compression

iSpring sets the 65 percent compression rate for video by default. You can set a lower bitrate for lower file size, but it will also affect the quality of the video.

Don’t forget to click on Save after you make the changes, choose the HTML5 format, and click on Publish .

Your presentation is now compressed. It looks and sounds just as crisp as the original PowerPoint presentation and is ready for sharing and delivery.

Try converting your PowerPoint to HTML5 with iSpring. It’s a really quick and easy way to compress PPT file. You don’t have to struggle with huge files or complicated compression software. HTML5 format is the most compact and neat output for your PowerPoint slides.

Plus, iSpring Converter Pro is not just a PowerPoint-to-HTML5 tool. It’s a robust authoring software that allows you to embed any video (e.g., from YouTube or Vimeo) into your slides. You can also set specific security settings for each presentation to protect your content from unauthorized access.

The HTML5 version of your presentation is mobile-ready and adapts to the screen size and orientation of any device.  The preview mode allows you to see exactly how your content will look to the viewer. You can enjoy full functionality iSpring Converter for free during the 14-day trial.

Fast PowerPoint to HTML5 Converter

Convert presentations to HTML5 with all effects and transitions preserved

Content creator:

Helen Colman

She enjoys combining in-depth research with expert knowledge of the industry. If you have eLearning insights that you’d like to share, please get in touch .

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