Compress PowerPoint without wrecking the slides
Shrink an oversized deck for email and upload. The pictures are re-encoded; text, layouts and animations stay exactly as they are. Free.
Three steps, done
Drop the deck
Drop a .pptx. You see its size, slide count and how much of it is pictures before anything changes.
Pick how hard to squeeze
Light, Balanced or Strong sets how large pictures can stay and how hard JPEGs are compressed. Photo PNGs can become JPEGs, and media nothing uses can go.
Download the smaller .pptx
You get the same deck with lighter pictures, plus a picture-by-picture breakdown of what shrank. A picture is only replaced when the new version is smaller.
Your deck, with a voice
Narrated PowerPoint
Every slide voiced by an AI voice, timed to auto-advance. Download the .pptx and press play.
Narrate every slide of my PowerPoint with a natural voice and give me the narrated .pptxMP3 narration
The whole deck as one clean audio file, or one clip per slide.
Read my PowerPoint aloud and give me the MP3Deck from a brief
Describe the talk. Noty writes the slides, designs them and narrates them.
Make me a narrated presentation aboutYour own voice
Clone your voice once and every deck sounds like you presenting.
Narrate my deck in my cloned voiceVideo export
SoonThe narrated deck rendered as an MP4 for YouTube, LMS or email.
Tell Noty you want videoSame slides, lighter file
Before
A deck that bounces from email
Full-resolution phone photos and PNG screenshots, each stored at far more pixels than any screen will show.
After
The same slides, a fraction of the size
Every picture sized for the screen it will be shown on. Text, layouts, transitions and animations untouched, so it opens and presents as before.
Sent the deck? Now give it a voice
A smaller file is easier to share. A narrated one presents itself. Tell Noty in the Studio chat and it writes narration from your slides, voices every one and hands back a PowerPoint that plays on its own.
Why is my PowerPoint so large?
A .pptx is a zip folder: a little XML for the text and layout, and a media folder with every picture, video and sound in the deck. Text almost never makes a deck heavy. The media folder does, and these are the usual reasons it fills up.
Photos straight from a phone
A phone photo is often 4,000 pixels wide and several megabytes. Making it smaller on the slide doesn’t make the file smaller: PowerPoint can keep the full-size original, so ten photos can outweigh the rest of the deck many times over. Scaling them to screen size is where most of the saving comes from.
Screenshots and photos saved as PNG
PNG is lossless: perfect for screenshots, logos and diagrams, wasteful for photos. A photo pasted as PNG can be several times the size of the same photo as a good JPEG. This tool turns photo PNGs without transparency into JPEG and leaves screenshots and logos as PNG.
Embedded video and audio
A few minutes of video can outweigh every picture in the deck. This tool doesn’t touch video or audio. Trim clips in PowerPoint, lower their quality with File → Compress Media, or link to the video instead of embedding it.
Media nothing uses any more
Some editors and export tools leave files in the media folder after the picture or clip that used them is gone. They add weight and never show. Remove unused media finds files that no slide, layout or master points at and drops them.
Embedded fonts
Save with “Embed fonts in the file” on and every font the deck uses travels inside it, often a few megabytes each. If the people you send it to have the fonts, turn the option off in PowerPoint’s Save settings.
The old .ppt format
Pre-2007 .ppt files are not compressed at all. Open the file in PowerPoint and save it as .pptx: the file usually gets smaller on its own, and then it can be compressed here.
Three ways to compress a deck
PowerPoint’s own Compress Pictures is safe but works one fixed resolution at a time. Online compressors vary: some re-save the whole file and some flatten what they don’t understand.
| Notevibes | PowerPoint “Compress Pictures” | Online compressors | |
|---|---|---|---|
| Keeps text, layouts, animations | Usually | ||
| Choose the strength | Fixed presets | Sometimes | |
| Removes unused media | Sometimes | ||
| Photo PNG → JPEG | |||
| Narrate the deck afterwards | |||
| Video export | Soon | Export only |
Compress here when the file is too big to send. Then, if nobody will be there to present it, have Noty narrate it.
Email limits and what to aim for
Gmail accepts attachments up to 25 MB per message. Outlook’s default is 20 MB, and many company mail servers set their own limit, sometimes lower. Learning platforms and submission portals often allow uploads of around 100 MB, but check the one you’re using.
Attachments are encoded for sending, which adds roughly a third to their size. A 20 MB deck can fail against a 25 MB limit, so aim a few megabytes under the number you’re given.
Start with Balanced. Pictures stay up to 1,920 pixels on the long side, which fills a 1080p screen, and most decks bounce back under the limit. If it’s still too big, run Strong. If Strong barely moves it, the weight is not in the pictures.
What compression cannot fix
Video is the usual culprit when a deck stays large. This tool leaves video and audio exactly as they are, so a deck with a few embedded clips can still be too big for email after its pictures are compressed. Trim the clips, compress them in PowerPoint, or share a link to the video instead.
Embedded fonts are the other one. They sit outside the media folder and nothing here changes them. Turn off font embedding if the recipients have the fonts, or accept the size.
Sometimes the deck is really a talk that needs the speaker. Instead of sending a heavy file and hoping it’s read, have Noty narrate it: every slide voiced, auto-advancing, in a natural AI voice or your own. A narrated video export, one file that plays anywhere, is coming soon.
Now give it a voice
Noty narrates every slide from its text or your speaker notes, in a natural voice or yours, and hands back a PowerPoint that presents itself.
Free to try · No credit card required
More PowerPoint tools
Frequently Asked Questions
How do I get my PowerPoint under 25 MB for email?
Drop it into the tool above and start with Balanced. If the pictures are what makes it heavy, that usually does it; if not, try Strong. If Strong barely changes the size, the deck is carrying video, audio or embedded fonts, which this tool doesn’t compress. Compression runs in your browser, so the deck isn’t uploaded anywhere first.
Will my slides lose quality?
Pictures larger than the preset are scaled down (2,560, 1,920 or 1,280 pixels on the long side) and JPEGs are re-encoded. On Light and Balanced the difference is hard to see on a normal screen. Strong is for email and handouts; look over photo-heavy slides before presenting on a large screen. Text, shapes and charts are not pictures and are not changed at all.
What’s the difference between PNG and JPEG here?
PNG keeps every pixel exactly and is best for screenshots, logos and diagrams. JPEG is far smaller for photos. With “Convert photo PNGs to JPEG” on, PNGs that look like photos and have no transparency become JPEGs. Pictures with transparent areas, and ones with few colours like screenshots, stay PNG.
Does it compress video in the deck?
No. Embedded video and audio are left exactly as they are. In PowerPoint, File → Info → Compress Media lowers their quality, or you can link to the video instead of embedding it.
Can I compress an old .ppt file?
Not directly. Open it in PowerPoint and save it as .pptx first. The old format isn’t compressed, so that step alone often makes the file smaller.
Is the compressed deck still editable?
Yes, it’s an ordinary .pptx. Slides, text, layouts, transitions, animations and speaker notes are untouched. Cropped pictures keep their crop. The only difference is that the pictures inside are smaller.
Does it work with Google Slides or Keynote?
The tool takes a .pptx. From Google Slides, use File → Download → Microsoft PowerPoint; from Keynote, File → Export To → PowerPoint. The compressed file opens in Google Slides, Keynote and PowerPoint.
Can Notevibes narrate the deck too?
Yes. Tell Noty in the Notevibes Studio and it writes narration for every slide from the slide text or speaker notes, voices it in a natural AI voice or your own cloned voice, and hands back a narrated .pptx that auto-advances, plus the MP3.