🎬 Video Format Converter
Re-encode clips for web pages, editors and platforms — or shrink them by lowering resolution and quality.
✅ Free · No sign-up
Choose a video or drag it here
Processed on your device — nothing is uploaded
Processed on your device — nothing is uploaded
Result
How to use the Video Format Converter
- Choose a video.
- Pick format, resolution, quality and audio option.
- Press Convert, watch the progress, preview and download.
Why creators use it
- Make a WebM version of a clip for your website.
- Shrink a 4K screen recording to 720p for sharing.
Good to know
- Uses FFmpeg compiled to WebAssembly (about 30 MB, downloaded once from jsDelivr and cached). It runs on one CPU core, so long or high-resolution videos take a while.
- Videos are limited to about 500 MB (lower on phones) because the whole file is processed in memory.
- Conversion speed is roughly real-time or slower for HD video. WebM uses the VP8 codec (VP9 is not available in the in-browser engine).
- Only process media you own or have permission to use.
Frequently asked questions
Why is it slow?
Encoding is CPU-heavy, and the in-browser engine uses a single core so it works on every browser without special server headers.