Compress a PowerPoint (PPTX) File
Compress PPTX files online by optimizing the embedded images — slides, layouts, fonts, animations and videos untouched.
How to use Compress PPTX
A heavy PPTX is almost always heavy because of the photos pasted into it. This tool opens the file's internal structure, re-compresses just those images at your chosen preset — downscaling the absurd 4000-pixel ones — and rebuilds the file with every slide, font, animation, chart and embedded video byte-for-byte untouched. Typical decks shrink 40–80%.
- Drop your file into the box above, or click it to browse. You can also paste from the clipboard.
- Adjust the options to taste — the defaults are sensible for most cases.
- Press Compress and watch the progress bar; everything runs on your device.
- Download your result — individually, or as a ZIP when there are several files.
Like every tool on ImageCompressorKits, this runs 100% in your browser: your file is never uploaded to any server, which makes it safe to use even with private documents — and it keeps working if you go offline after the page loads.
Frequently asked questions
Will my animations, fonts or videos break?
No. Only image data inside the file is re-encoded; slides, XML, fonts, media clips and animations are copied through unchanged, so the deck behaves identically in PowerPoint.
Why didn't my file shrink much?
Its weight is somewhere other than photos — usually embedded video or fonts, which are deliberately left untouched, or images that are already well compressed. The result card shows exactly what was saved.
Is this tool really free?
Yes — completely free, with no signup, no watermark, and no file limits beyond what your device's memory can handle.
Are my files private?
Yes. Processing happens locally in your browser via JavaScript; nothing is transmitted or stored. See our privacy policy for the full picture.