Show HN: VidShift – Free video converter that runs in the browser

[jgillyon]

I built a video converter/toolkit that processes everything locally in the browser using WebAssembly (via the Mediabunny library and WebCodecs).

No files are uploaded to any server. The whole thing is a static site on Cloudflare Pages. It even works offline via a service worker.

Tools included: format conversion (MP4/WebM/MKV/MOV/etc.), compression, trimming, video-to-GIF, MP4-to-MP3, mute, rotate/flip, speed change, and frame extraction.

Best experience is on Chrome/Edge due to broader WebCodecs support. Safari and Firefox work but have more limited codec coverage.

Would love feedback, especially from anyone who has worked with WebAssembly for media processing.