WebM to MKV
Change WebM to MKV and keep the quality you need. Free for up to 10 files a day, no sign-up.
WebM
Your files
Drop your .webm files here
or
You can add several files and convert them together.
How to convert WebM to MKV
- Drop your WebM file into the box above, or add it from a link.
- MKV is already selected. Use the settings button next to it to change size, quality or other options.
- Select Convert, then download your MKV file.
To do this from your own code, call the FileForge API with "output_format": "mkv".
About the formats
.webm
WebM is an open video format designed for the web, usually with VP9 or AV1 video. Browsers play it well, but iPhones, video editors and many TVs don't.
.mkv
MKV (Matroska) is a flexible video container that can hold many audio and subtitle tracks. It's popular for films and recordings, but phones, browsers and editing apps often won't play it.