Optimize MP4 for the web with WEBM. MP4 to WEBM runs locally with ffmpeg.wasm.
Your data is processed entirely in your browser. Nothing is uploaded to any server.
Yes, it is free and runs entirely in your browser.
No. Videos are processed locally with ffmpeg.wasm for privacy.
MP4, MOV, WebM, AVI, MKV and more depending on the tool.
No. It works in any modern browser.