MKV → WebM
MKV to WebM
Convert MKV video to WebM with control over quality, resolution, and frame rate. Free and unlimited.
Drag & drop files here, or click to choose
.mp4,.mov,.webm,.mkv,.avi,.m4v,.mpg,.wmv,.3gp · up to 3 files
Files are sent over encrypted HTTPS, processed on our servers, and permanently deleted within 2 hours.
Need a different format? Open the full Convert Video to pick any output.
About converting MKV to WebM
MKV is a flexible container that can hold multiple audio, video, and subtitle tracks in one file. WebM is an open, royalty-free video format that's efficient and ideal for the web. Converting from MKV to WebM swaps one for the other without changing the underlying content.
Re-encoding video is lossy, so we use quality-preserving defaults — you can still tune the resolution, quality, and frame rate before you start.
How it works
- Choose your MKV file
- Pick your options
- Download the WebM
Frequently asked questions
How do I convert MKV to WebM?
Upload your MKV file above, and it converts to WebM in seconds. It's free, needs no sign-up, and there are no watermarks.
Is the MKV to WebM converter free?
Yes — completely free with no limits, no account, and no watermarks.
Will converting MKV to WebM reduce quality?
We use high-quality conversion settings to preserve as much fidelity as possible. You can often adjust quality options before converting.
Is it safe to convert MKV files here?
Yes. Files are deleted automatically within 2 hours and are never read or shared.