WebM
WebM is an audiovisual media file format. It is primarily intended to offer a royalty-free alternative to use in the HTML5 video and the HTML5 audio elements. It has a sister project, WebP, for images. The development of the format is sponsored by Google, and the corresponding software is distributed under a BSD license.
| Filename extension |
.webm |
|---|---|
| Internet media type |
video/webm, audio/webm |
| Developed by | Initially On2, Xiph, and Matroska; later Google |
| Initial release | May 18, 2010 |
| Latest release | v1.13.0 January 31, 2023 |
| Type of format | Container format |
| Container for | VP8/VP9/AV1 (video) Vorbis/Opus (audio) |
| Extended from | Limited subset of Matroska |
| Open format? | Yes |
| Free format? | Yes |
| Website | webmproject.org |
The WebM container is based on a profile of Matroska. WebM initially supported VP8 video and Vorbis audio streams. In 2013, it was updated to accommodate VP9 video and Opus audio. It also supports the new AV1 codec.
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