WEBM file format
WebM (Matroska-based) · Video · .webm
or drag & drop videos, audio or images here, or paste with Ctrl+V
MP4 · MOV · MKV · AVI · WebM · WMV · FLV · GIF · MP3 · WAV · M4A · and 40+ more
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WebM is an open, royalty-free format designed for the web. It uses VP8 or VP9 video with Opus or Vorbis audio and is natively supported by Chrome, Firefox, Edge and modern Safari.
Technical details
| Full name | WebM (Matroska-based) |
|---|---|
| File extension | .webm |
| MIME type | video/webm |
| Video codecs we export | VP8 (WebM) |
| Audio codecs we export | Opus, Vorbis |
| Best for | Websites, HTML5 video and open-source projects |
Last updated 2026-11-13
WEBM conversions
WEBM FAQ
What is a WEBM file?
WEBM (WebM (Matroska-based)) is a video format. WebM is an open, royalty-free format designed for the web. It uses VP8 or VP9 video with Opus or Vorbis audio and is natively supported by Chrome, Firefox, Edge and modern Safari.
How do I open a WEBM file?
Most modern players such as VLC open WEBM files. If yours doesn't, convert it to MP4 above, which plays on every device.
How do I convert a WEBM file?
Drop the file into the converter on this page, choose the output format and click “Convert & download”. It's free and runs in your browser without uploading.
What is WEBM best for?
Websites, HTML5 video and open-source projects.