00video

WebM

WebM is a Matroska subset restricted to royalty-free codecs — VP8/VP9/AV1 video with Vorbis or Opus audio — created so the web could ship video without licensing fees.

Extension: .webm
MIME type: video/webm

01 Convert WebM to something else

WebM to MP3 For screen recordings and downloaded browser media.
WebM to GIF VP8, VP9 and AV1 all decode natively here.

03 Related formats

Opening a .webm file

If you landed here because something handed you a .webm file and nothing on your machine will open it, converting it to a format you already have a reader for is usually faster than installing new software. Every conversion above runs in this browser — the file is not uploaded, so it works on a locked-down work machine and on a file you are not allowed to send anywhere.