MP4 → WebM
Convert MP4 video to WebM format
Frequently asked questions
- Is this online video converter free?
- Yes. It is completely free with no limit on the number of files, no watermark, and no sign-up required.
- Are my videos uploaded to a server?
- No. The conversion runs entirely in your browser using the WebCodecs API, so your video never leaves your device and stays private.
- Which formats can I convert?
- You can convert between MP4, WebM, MKV and MOV in any direction — for example MP4 to WebM, WebM to MP4, or MOV to MP4.
- Is there a file size limit?
- There is no fixed limit. Because processing is local, the practical limit depends on your device's memory rather than an upload cap.
- Which browser works best?
- A Chromium-based browser such as Chrome or Edge 94+ gives the widest format support and hardware acceleration. Safari 16.4+ works for many conversions too.
