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What this tool offers
This tool reduces PPTX file size by recompressing images in your browser.
- Recompress images: Images are re-encoded at selected quality and large images are resized.
- Quality controls: Use presets or slider from 30% to 100%.
- Size comparison: Review original vs compressed size and percent change.
- Output filename: Optionally set a custom output name.
- Private processing: Files are processed locally, no uploads.
Why compress PowerPoint?
Compression helps with sharing, upload limits, and storage while preserving presentation usability.
How it works
Upload a PPTX, choose image quality, then compress and download the new file.
Tips for compressing PowerPoint
- Start with Balanced (80%) for a good quality-size tradeoff.
- Image-heavy decks benefit the most from compression.
- Use High (95%) when visual quality is critical.
Powered by browser APIs and client-side processing.
Frequently Asked Questions
Is my file secure?
Yes. Processing runs in your browser and your file never leaves your device.
What gets compressed?
Images in the presentation are recompressed. Text and other content remain unchanged.
Will quality drop?
Lower quality reduces size but may reduce image sharpness.
Can I set the output filename?
Yes. Leave blank to use the original name with _compressed appended.
How do I see size comparison?
After compressing, you will see original size, compressed size, and percentage change.
What if my PPTX has no images?
Size may change little because image recompression provides most savings.