Convert WebM to MKV
Pick a source and destination format below, then upload your file.
Drag & drop a file here, or
Uploading auto-detects the source format above.
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About these formats
WebM is an open, royalty-free video format built for the web -- small file sizes, native playback in every modern browser, and the format of choice for embedded HTML5 video.
MKV (Matroska) is a flexible open-source video container that can hold multiple audio tracks and subtitles in one file, popular for high-quality rips and archives.
How to convert webm to mkv
- Upload or drag & drop your file into the converter above.
- Confirm the output format in the destination dropdown.
- Click Convert, then download your converted file.
Frequently asked questions
Is it free to convert WebM to MKV?
Yes -- converting WebM to MKV on digiutil is completely free. There's no signup, no watermark, and no install required.
How do I convert WebM to MKV?
Upload your WebM file using the converter above, confirm MKV as the output format, and click Convert. When the conversion finishes, a download button appears.
Is my WebM file safe?
Yes. Files are processed over an encrypted connection, never shared, and automatically deleted from the server shortly after conversion.
Do I need to install any software?
No -- the whole conversion happens in your browser and on our servers. It works on Windows, Mac, Linux, iPhone, and Android with nothing to install.