Convert MKV files to WEBM online, free and without signup. Upload your MKV file below and download the converted WEBM in seconds. You get 10 free conversions every day, and files are automatically deleted after 24 hours.
Drag & drop files here
PDF, DOCX, JPG, PNG, MP4, MP3, and 200+ formats
MKV is an open-source container holding unlimited tracks.
WebM is designed for web use with HTML5.
Upload your MKV file using the button above. Files up to your plan limit are supported.
Click Convert. Your file is processed on our servers with industry-standard engines like FFmpeg and LibreOffice.
Download your WEBM file. It stays available for 24 hours, then it is deleted automatically.
Yes. ConvertFly offers 10 free conversions every day with no signup required. For higher volumes, credit packages start at $8.
Yes. Files are encrypted during transfer and automatically deleted after 24 hours. ConvertFly is operated by Dizzus GmbH in Switzerland.
No. The conversion runs entirely in the cloud: it works from any browser, on desktop or mobile.
| MKV | WEBM | |
|---|---|---|
| Type | video | video |
| In short | MKV is an open-source container holding unlimited tracks. | WebM is designed for web use with HTML5. |
Convert MKV to WEBM online for free. Fast, secure video conversion powered by industry-standard engines. No signup required, files auto-delete after 24 hours. Operated by Dizzus GmbH on private infrastructure.