WebM is the web’s open video format, with VP8, VP9 or AV1 video and Opus or Vorbis sound. Screen recorders, browser downloads and many sites use it.
Many apps, older iPhones and video editors still won’t take WebM. The MP4 from this tool has H.264 video and AAC sound, which open anywhere. Because the codecs differ, the video is re-encoded at high quality. The video never leaves your device. It is read and saved by your browser, so there is no upload, no queue and no copy on a server.
How to convert WebM to MP4
- Drop your WebM file on the box above.
- MP4 is already selected. You can pick another format if you need one.
- Press Convert to MP4 and download the new file.
Questions
Why is WebM not supported everywhere?
Apple and many editors focused on MP4 and H.264. Support for WebM is growing, but MP4 is still the safe choice.
How long will it take?
About as long as the video plays on a recent laptop, often faster.
Will a screen recording stay sharp?
Yes. Text and edges are kept sharp with high-quality settings.