Show HN: PPT Compressor – Compress PowerPoint files in the browser

Hi HN

I built a simple online PowerPoint compressor that runs entirely in the browser: https://www.pptcompressor.online/

No server uploads. No login. No installation.

It works by unpacking `.pptx` files, recompressing embedded images with Canvas/WebP, and zipping them back — all using JavaScript and Web APIs. Great for reducing file sizes before sending slides by email or uploading to platforms with size limits.

Built with: - JSZip - Canvas API - Web Workers - Pure HTML/CSS/JS (no backend)

I’d love feedback on speed, compatibility, and ideas for new features (e.g. batch mode or PDF support). If you're working on browser-native tools too, happy to connect!

Thanks