MKV to WEBM Converter
Need to convert this file type? Drop it below — or drop any other file and we'll auto-switch. Outputs are auto-deleted after 2 hours; share links expire after 4.
Or paste a link to a file
Drop multiple images to combine them into one PDF, Word document, or PowerPoint presentation — or convert each image separately.
Drop
Drag your MKV file or click to browse.
Convert
WEBM is preselected, or pick a different format below.
Download
Get your file or share a 1-hour link.
Convert MKV to WEBM online
Use this MKV to WEBM converter to turn MKV files into WEBM right in your browser — ideal for web video, open-source playback and fast-loading clips. WEBM is valued for being small for the web, while MKV comes with a tradeoff: not supported on all devices.
When should you convert MKV to WEBM?
- To reduce file size and make uploading and sharing easier
- To get WEBM's built-in advantage: small for the web
- To move past MKV's common limitation: not supported on all devices
- To open your files in apps that prefer WEBM
About MKV and WEBM files
MKV video
Strengths
- holds many tracks
- flexible container
- high quality
Limitations
- not supported on all devices
WebM video
Strengths
- small for the web
- open and royalty-free
Limitations
- limited support in some apps
- less common offline
MKV vs WEBM
| Format | MKV | WEBM |
|---|---|---|
| Compression | Lossy | Lossy |
| Transparency | — | — |
| Best for | high-quality video and multiple audio and subtitle tracks | web video and open-source playback |
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Frequently asked questions
- Is this MKV to WEBM converter free?
- Yes. You can convert MKV to WEBM online for free, with no account and no watermark.
- Do I need to install software or sign up?
- No. The conversion runs entirely in your browser — no installs and no account required.
- Will converting MKV to WEBM reduce quality?
- WEBM uses lossy compression, so the file can get smaller while some visual quality may change.
- Are my files safe?
- Yes. Files are processed only to complete the conversion and are auto-deleted after 2 hours. We never share them.
- Can I convert multiple MKV files at once?
- Yes. Drop several files to convert them in a batch and download the results as a single ZIP.