Convert your WebM files to MKV format instantly. Free, fast, and no registration required.
Drag & drop your WebM file here
WebM
An open video format developed by Google, optimized for the web. Uses VP8/VP9 codecs for efficient streaming and plays natively in all modern browsers.
MKV (Matroska Video)
A flexible container that can hold virtually unlimited video, audio, and subtitle tracks. Popular for high-quality video files but not supported by all devices natively.
Need your file in a different format? Converting from WEBM to MKV lets you use your media wherever you need it โ whether it's for compatibility, smaller file size, or a specific app or device that requires MKV files.
Yes, completely free with no limits. No account, no watermarks, no hidden fees.
We use optimized conversion settings to preserve as much quality as possible. Some quality difference is normal when converting between lossy formats, but it's minimal and usually unnoticeable.
Most files convert in seconds. Larger files may take a bit longer depending on size, but conversion happens right in the cloud so your device stays fast.
You can convert files up to 500 MB. That's enough for most video, audio, and image files you'll need to convert.
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