Convert WebM to MP4
Turn a WebM screen recording or download into a widely compatible MP4.
Frequently asked questions
Why convert WebM to MP4 at all?
WebM (VP8/VP9) isn't supported by every video editor, older TV or iOS Photos app the way MP4/H.264 is, so converting maximises compatibility.
Will the audio stay in sync?
Yes — ffmpeg re-muxes timestamps during re-encoding, so sync is preserved even across differing frame rates.