How to convert WebM to MP4
- Drop your WebM videos into the box or choose them.
- Each one is converted to MP4. The progress shows next to the file.
- Download the MP4s, or all of them as a zip.
Where WebM files come from
Screen recorders built on browser APIs, OBS, many online meeting tools and video downloads from some websites save WebM. It’s a good open format for the web, but editing apps like iMovie and many phone apps don’t open it, so MP4 is the safer format for sharing and editing.