How to convert AVI to WEBM
- Add your .AVI file - drop it in the box above or click to browse.
- Convert it to .WEBM in a few seconds.
- Download your new .WEBM file.
What to expect
- A full re-encode is always required - no stream copy is possible - so the WEBM will not be a bit-for-bit copy of the source.
- VP9 encoding is slow; for faster results with FFmpeg, add
-cpu-used 4to the command at a small quality cost. - AVI metadata such as title and creation date is not carried over to WEBM and will be lost.
Frequently asked questions
Does AVI to WEBM always require re-encoding?
Yes - WEBM only accepts VP8, VP9, or AV1 video and Vorbis or Opus audio, none of which are used in typical AVI files, so every conversion is a full re-encode.
Will the WEBM file be smaller than the original AVI?
Usually yes - VP9 is more efficient than older AVI codecs like DivX or Xvid, so file size typically decreases even at comparable quality.
Does Safari support WEBM?
Safari has supported VP9 WEBM since version 16 (macOS Ventura, 2022); for older Safari, serve an H.264
MP4 alongside the WEBM using <source> tags.How long does conversion take?
Expect roughly 1-5 minutes of encoding time per minute of video, depending on resolution and CPU speed; a 1-hour AVI can take several hours.
Programs that convert AVI: Freemake Video Converter · Free Studio · MediaCoder · SUPER · Miro Video Converter · XMedia Recode · Wondershare Video Converter · Arista Transcoder
