WEBM MKV
Convert WebM Video to Matroska Video online — free, fast, and high-quality.
Drop your files here or click to browse
Converts to MKV · up to 2 files per batch
Instant MKV downloads
No watermarks, ever
Files auto-deleted after conversion
How to convert WEBM to MKV
- 1Drag and drop your WEBM file into the box above.
- 2We upload it securely and convert it to MKV on our servers.
- 3Download your MKV file — no signup required.
Frequently asked questions
How do I convert WEBM to MKV?
Upload your WEBM file, click Convert, and download the MKV result. Conversion runs on our servers, so nothing is installed on your device.
Is the WEBM to MKV converter free?
Yes. You can convert WEBM files to MKV for free, with generous daily limits and no watermarks.
Is it safe to convert WEBM files here?
Uploads are transferred over HTTPS, processed in isolated workers, and automatically deleted after a short retention window.
What is the maximum WEBM file size?
Free conversions support files up to 250 MB. Premium plans raise this to 5 GB.