How do you compress images in PowerPoint?

To compress images in PowerPoint, select a picture, open the Picture Format tab and choose Compress Pictures. Clear "Apply only to this picture" so every picture in the deck is included, tick "Delete cropped areas of pictures", pick a resolution such as 150 ppi and select OK. The command exists in the desktop apps for Windows and Mac, not in PowerPoint for the web.

Pictures are usually the largest thing in a presentation, so this one dialog fixes most oversized decks. This page gives the exact steps for Windows and Mac, the resolution to choose for screen, print and email, the default settings that stop images growing back, what compression leaves untouched, and why the same heavy images keep returning in teams that copy decks.

How do you compress images in PowerPoint on Windows?

You compress images in PowerPoint on Windows from the Compress Pictures command on the Picture Format tab. It works in PowerPoint for Microsoft 365, 2024, 2021, 2019 and 2016, and one pass can cover every picture in the file.

1. Open the presentation in the PowerPoint desktop app and select any picture. The Picture Format tab appears. If it does not, double-click the picture.
2. On the Picture Format tab, in the Adjust group, select Compress Pictures. On a narrow screen the button shows as an icon without a label.
3. Under Compression options, clear Apply only to this picture to compress every picture in the presentation. Leave it ticked to compress only the pictures you selected.
4. Tick Delete cropped areas of pictures. PowerPoint keeps the hidden part of every cropped picture until you do, and the deletion cannot be undone.
5. Under Resolution, pick a target: 220 ppi for print, 150 ppi for screens and projectors, 96 ppi for email, or Use default resolution.
6. Select OK, then save the file. The changes are made when the dialog closes, and the smaller size shows once the file is saved.

Clearing "Apply only to this picture" also overrides any compression you set earlier on individual pictures. If one picture needs to stay sharper than the rest, compress the whole deck first, then select that picture alone and compress it again at a higher resolution.

How do you compress images in PowerPoint on a Mac?

You compress images in PowerPoint on a Mac from the same Compress Pictures command, with the choices laid out as a picture quality list and an "apply to" choice. The steps cover PowerPoint for Microsoft 365 for Mac and PowerPoint 2019 and later.

1. Open the presentation and select a picture. The Picture Format tab appears in the ribbon.
2. Select Compress Pictures on the Picture Format tab. The same command sits on the File menu as File, Compress Pictures.
3. In the Picture Quality list, choose a resolution. The highest quality is listed first, and the email option gives the smallest file.
4. Tick Delete cropped areas of pictures to discard the hidden parts of cropped pictures.
5. Choose All pictures in this file to compress the whole deck, or Selected pictures only for the pictures you selected. Hold Shift to select several pictures first.
6. Select OK and save the presentation.

Two Windows options are missing on a Mac. Compress Media, which shrinks embedded video, is Windows only, and the Mac app has no File, Options, Advanced page for a default resolution.

Can you compress images in PowerPoint for the web?

You cannot compress images in PowerPoint for the web. Microsoft states that picture compression is available only in the desktop versions of the Office apps, so PowerPoint for the web has no Compress Pictures command and no Image Size and Quality settings.

The workaround is to open the file in the desktop app. In PowerPoint for the web, open the Editing menu and choose to open the presentation in the desktop app, compress the pictures there, and save. The file saves back to the same OneDrive or SharePoint location, so co-authors see the smaller version.

Which resolution should you choose when you compress images in PowerPoint?

The resolution to choose when you compress images in PowerPoint depends on where the deck will be seen: 150 ppi for screens and projectors, 220 ppi for print, and 96 ppi when the file has to fit into an email. Microsoft 365 sets 220 ppi as the default.

The table below names the common resolution targets and the situation each one fits.

Compression only reduces. A picture inserted at 96 ppi does not become sharper when you choose 220 ppi later, so keep the original image file if there is any chance the deck will be printed.

Which PowerPoint settings stop images growing again?

Three settings under File, Options, Advanced, Image Size and Quality stop images growing again on Windows. They apply to the presentation chosen in the list at the top of that section, and they decide what PowerPoint does with every picture inserted after you set them.

• Default resolution: Set it to 150 ppi or lower, as Microsoft suggests for smaller presentations. New pictures are compressed to this target as they are inserted.
• Discard editing data: PowerPoint stores the original of every picture you recolor, crop or apply an effect to, so the edit can be undone. Ticking this removes the stored original. To undo an edit later, insert the picture again.
• Do not compress images in file: Make sure this box is clear. When it is ticked, PowerPoint keeps every picture at full size and ignores the default resolution.

Compress images in PowerPoint with the dialog once, then set these three options, and the deck stays small as people add pictures to it. The settings live in the file rather than with the person, so a deck someone else created keeps whatever they chose.

What does compressing images in PowerPoint not fix?

Compressing images in PowerPoint does not touch video, audio, embedded fonts or unused slide masters. When a deck is still large after the pictures are compressed, one of these is holding the size, and each has its own fix.

Embedded video and audio: On Windows, File, Info, Compress Media offers Full HD (1080p), HD (720p) and Standard (480p). Compression drops embedded subtitles and alternate audio tracks. The option does not exist on Mac or the web, where hosting the video online and inserting it as an online video is the way to keep it out of the file.

Embedded fonts: Under File, Options, Save, choose to embed fonts and select "Embed only the characters used in the presentation". Embed all characters only when other people need to edit text in a custom font.

Everything else: Unused masters, layouts and hidden objects add weight slowly. The guide to why a PowerPoint file grows too large covers the full list of causes, and the blog post on decreasing the size of PowerPoint presentations walks through the remaining fixes. If the goal is to get one large deck to a client, the page on sending a PowerPoint that is too big to email covers the options that skip the attachment.

Why do decks get heavy again after you compress images in PowerPoint?

Decks get heavy again because compression fixes one file, and teams work in copies. Each person who needs a slide copies it from an older deck, and the full-size picture on that slide travels with it into the new file.

A product photo inserted at camera resolution into one deck becomes part of every deck built from it. Twenty sellers each copy the slide into their own client versions, and the same 8 MB picture now exists in a hundred files. Someone compresses images in PowerPoint in their own copy, and the other ninety-nine keep the full-size picture. The next deck is built from one of those.

The fix that lasts sits before the slide is copied. When an approved image is sized once by the person who owns it, and every deck starts from that version, nobody has to compress images in PowerPoint after the fact. That is a question of where slides and images come from, which is the job of presentation management.

What are the ways to compress images in PowerPoint across many files?

The ways to compress images in PowerPoint across many files fall into four categories: the built-in dialog, batch compression utilities, image optimizers used before insertion, and a central library that sizes approved images once at the source. The first three shrink files that already exist. The fourth changes what goes into new ones.

The table below names a representative tool in each category and the situation each one fits.

What is smart image compression in SlideHub?

Smart image compression in SlideHub gives each picture a file-size budget based on how much of the slide it covers, and compresses only the pictures that exceed that budget. It runs when slides or templates are added to the library. The upload check flags heavy images, and the library owner chooses to optimize them or keep the originals.

The logic compares the size of the picture on the slide with the size of the file underneath it. A photo that fills the whole slide needs far more data than the same photo cropped into a small box, yet both often arrive as the same multi-megabyte camera file. Listed below are the five steps SlideHub runs on every slide and template it optimizes.

1. Skip what is already light: pictures under 200 KB, or under 1,000 pixels on both sides, are left untouched.
2. Measure slide coverage: SlideHub compares the area of the shape holding the picture with the area of the slide. A slide background counts as the full slide.
3. Set a budget from that coverage: the more of the slide a picture fills, the larger the file it may keep. At the standard setting, a full-slide photo keeps up to about 2 MB and a picture covering a tenth of the slide or less is held to about 0.3 MB.
4. Compress only what is over budget: pictures above their budget are resized in proportion until they fit, never below a tenth of their original width. JPEG pictures stay JPEG, and other formats are saved as PNG so transparency survives.
5. Reach every place a picture can sit: picture frames, shapes filled with a picture, slide backgrounds, and the masters and layouts behind the slides. A picture used on several slides is compressed once.

Smart image compression differs from Compress Pictures in where and when it runs. Compress Pictures works inside one open file, at a resolution the person picks. SlideHub's compression runs once, at the point content enters the library, with a budget set per picture. Every deck built from the library afterwards starts with the lighter version, so nobody has to compress images in PowerPoint again for the same slide.

How does SlideHub keep images in PowerPoint decks small and approved?

SlideHub keeps images in PowerPoint decks small and approved by giving every deck the same starting point. SlideHub combines presentation management and sales content management: approved slides, images, logos and icons live in one library, and people insert them from a task pane inside PowerPoint instead of copying them from old decks.

An image goes into the library once, sized by the person who owns it and trimmed by smart image compression on the way in, and every seller who inserts it gets that version rather than the camera original sitting in somebody's downloads folder. The image search inside PowerPoint finds it in plain words, with machine-learned auto-tagging doing the labeling. Slides are held as individual items rather than inside one master deck, so the library never becomes the oversized file. When a slide is corrected, slide-level version control updates every linked copy, so the fixed version replaces the heavy one in decks that used it.

The same library feeds the other half of the job. Reps tailor decks inside locked boundaries, share them as a tracked link rather than a large attachment, and content owners see which slides and images get used. The guide to how a slide library works covers the model in more depth.

More than 500 organizations and more than 10,000 professionals use SlideHub each month, including KPMG, Thyssenkrupp and Holmris B8, and SlideHub is rated 4.9/5 on G2. SlideHub is SOC 2 Type II and Cyber Essentials certified, with customer data hosted in AWS in the EU under GDPR; the security overview has the detail. Compare plans on the pricing page or book a demo to see the library working inside PowerPoint.

Frequently asked questions about compressing images in PowerPoint

How do I compress all images in PowerPoint at once?

Select any picture, open the Picture Format tab and choose Compress Pictures. Clear the "Apply only to this picture" check box, pick a resolution and select OK. PowerPoint then compresses every picture in the presentation. Clearing that box also overrides any compression you set earlier on individual pictures.

Does compressing images in PowerPoint reduce quality?

It can. Compression lowers the resolution of each picture to the target you pick and can delete cropped areas for good. At 150 ppi most pictures look the same on a laptop or projector. At 96 ppi photos can soften on a large screen. Keep an uncompressed copy if the deck may be printed.

Why is Compress Pictures not available in PowerPoint for the web?

Microsoft offers picture compression only in the desktop versions of PowerPoint for Windows and Mac. PowerPoint for the web has no Compress Pictures command. Open the file in the desktop app from the Editing menu, compress there, and save it back to OneDrive or SharePoint.

What resolution should I use to compress images in PowerPoint?

Use 150 ppi for decks shown on screens and projectors, 220 ppi for decks that will be printed, and 96 ppi for a file that has to fit in an email. Microsoft 365 uses 220 ppi as the default, and Microsoft suggests a default of 150 ppi or lower to keep presentations small.

Does SlideHub compress images in PowerPoint automatically?

SlideHub compresses heavy images when slides or templates are added to its library, if the library owner chooses to optimize them. Each picture gets a file-size budget based on how much of the slide it covers, and only pictures over that budget are resized. Every deck built from the library then starts from the lighter version.

Why is my PowerPoint still large after compressing the images?

Something other than pictures is holding the size. Embedded video and audio, embedded fonts with every character, and unused slide masters all survive picture compression. On Windows, File, Info, Compress Media shrinks video. Embedding only the characters used shrinks fonts. Removing unused masters takes out the rest.