About JustCompressVideo
JustCompressVideo is a free, browser-based video compression tool powered by ffmpeg.wasm. Your videos are processed entirely on your device — nothing is uploaded to any server.
How it works
This tool uses ffmpeg.wasm, a WebAssembly port of the FFmpeg library. All H.264 encoding runs locally in your browser. No server receives your files.
Privacy
Your video files never leave your device. You can verify this in your browser's DevTools Network tab — no video upload requests will be visible during compression.