MKV vs WEBM
A quick, plain-English comparison of the MKV and WEBM file formats — and how to convert between them, free and in your browser.
| MKV | WEBM | |
|---|---|---|
| Category | video | video |
| Extension | .mkv | .webm |
| MIME type | video/x-matroska | video/webm |
| Converts to | 31 formats | 31 formats |
| Direction here | read & write | read & write |
Convert between MKV and WEBM
MKV vs WEBM: frequently asked questions
What's the difference between MKV and WEBM?
Matroska open multimedia container. Open web video container (VP8/VP9/AV1).
Should I use MKV or WEBM?
Both are video formats — the right one depends on compatibility, quality and file size for your use. Whichever you have, you can convert it to the other below in seconds.
How do I convert MKV to WEBM?
Open the MKV-to-WEBM converter, drop your MKV file in, and download the WEBM. We auto-detect the real format from the file's bytes, so a mislabeled file still works.