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Bawitools

PowerPoint Compressor

• 100% local, no file uploads

Upload your PowerPoint

Drag and drop or click to select

📄 📽️ .pptx · max. 500 MB
WHAT IS OPTIMIZEDOptimize images. Keep videos, transitions, and animations intact.

COMPRESSION MODE

Safe

5–25%
Only recompress the ZIP. Preserves absolutely everything: videos, macros, transitions, animations.

Balanced

25–55%
Recompress ZIP + optimize images to 85% quality.

Maximum

45–75%
Images at 70% quality with reduced resolution.

RESULT

The compressed file will appear here

Select or drag a file to start
PowerPoint compression guide

Compressing PowerPoint: the deck that will not fit in an email

Full-bleed images, embedded video and slide masters: where a .pptx file's megabytes come from

Of the Office formats, PowerPoint is by far the one that balloons most. The reason is obvious once you think about it: a presentation is, by definition, a visual document. Where a Word report has paragraphs, a slide has a full-bleed photograph, a chart, an icon and sometimes a video.
A .pptx is also a ZIP with XML inside, just like .docx and .xlsx. The slide text takes a minimal fraction; the rest is the media folder.

Where the megabytes come from

ElementTypical weightCan it be reduced
Full-screen background imagesVery high, and repeated slide after slideYes, a great deal
Embedded videoThe largest of all: tens or hundreds of megabytesYes — or better, link instead of embedding
Audio and narrationHigh in self-running decksYes
Unused slide masters and layoutsModerate but silentYes, by removing the unused ones
Text, shapes and native chartsVery low: they are vector-basedNeither possible nor necessary
The detail usually overlooked is cropped images. When you crop a photo inside PowerPoint, the program does not discard what falls outside: it keeps the whole image and notes which part to show, in case you want to undo the crop later. A deck with twenty cropped photos can be carrying twenty complete images of which only a portion is visible.

Embedded video deserves its own decision

A video embedded inside the .pptx is usually, on its own, the reason a deck weighs 300 MB. Before compressing, it is worth deciding whether it really needs to travel inside the file: linking it or uploading it to a platform and adding a link leaves the presentation at a fraction of its size.
The trade-off of linking is that you need a connection — or the video file alongside the deck — at presentation time. If you are presenting with no guaranteed internet, embedding and compressing is the sensible option.

What resolution your slides actually need

A 16:9 slide is normally projected at 1920×1080 pixels. Any image filling the whole slide needs no more than that to look perfect on a projector or screen. A 6000×4000 pixel photo at full bleed is supplying more than three times the pixels the projector can display.
That headroom is exactly what compression exploits, and it explains why PowerPoint reductions are usually so large with no visible difference when projected.

What stays untouched

  • Animations and transitions between slides keep working as before.
  • Text, shapes and native charts are vector-based: they stay crisp at any size and are unaffected.
  • Speaker notes and slide order do not change.
  • Hyperlinks remain functional.

Compressing your presentation step by step

Decide what to do about video

If there is embedded video and you will have a connection when presenting, linking it reduces the file far more than any compression.

Upload your .pptx file

Drag it onto the drop zone or click to select it. It is processed inside your browser.

Pick the compression level

For projecting or emailing you can be aggressive; for printing, be conservative.

Review it in presentation mode

Run it full screen and check the slides with background photos before discarding the original.

Almost always because of full-screen background images inserted at camera resolution, or embedded video. Text and native shapes take a minimal fraction of the file.

No. Animations, transitions, speaker notes and hyperlinks are preserved intact. Compression acts on the embedded media, not on the presentation structure.

Because PowerPoint keeps the whole image and merely notes which part to show, so you can undo the crop later. What you removed visually is still stored inside the file.

If you will have a connection when presenting, the most effective move is not to embed it: link it, or upload it to a platform and put the link on the slide. If it has to work offline, embed it but compress the video first.

At a reasonable compression level, no. A typical projector shows 1920×1080 pixels, far below the resolution inserted photos usually have, so there is plenty of headroom. If the deck is going to be printed, use less compression.

Yes. The result is a standard .pptx, editable in PowerPoint, Google Slides or LibreOffice Impress.

Free

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100% local compression

Your presentations are never uploaded to a server

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