Compress PowerPoint
Reduce PPTX size by optimizing embedded images. Accepts PPTX up to 20 MB. Produces smaller PPTX file. Processing happens locally in your browser.
Input: PPTX up to 20 MB · Output: smaller PPTX file
Quality boundary
PPTX compression optimizes compatible embedded images and package structure. Video, audio, fonts, charts, animations, and unsupported media are preserved rather than rewritten, so image-light presentations may shrink very little; rewriting invalidates existing Office digital signatures.
How this file is processed
The file stays on this device during processing. Review the result before consequential use.
Read the Office compression workflow
Useful next actions
Reduce PowerPoint size while preserving the presentation package.
Presentation size is often driven by high-resolution photos and screenshots. Compatible images can be optimized locally while slides, charts, audio, video, and animations remain in the PPTX structure.
Focus on oversized slide images
Choose a level based on where the deck will be viewed. A screen-only presentation can use smaller images than a deck intended for large displays or print handouts.
Run the slideshow after compression
Open the result in PowerPoint and inspect image-heavy slides, crops, transparency, charts, embedded fonts, transitions, audio, and video. Media that cannot be safely recompressed is preserved unchanged.
Quick quality check
- Keep the PPTX source
- Inspect image-heavy slides
- Run the slideshow
- Test audio and video
- Check fonts and charts