Convert MKV to MP4
MKV is a flexible container that's popular with screen recorders like OBS, but phones, TVs and editors don't always accept it. Converting to MP4 fixes that.
How to convert MKV to MP4
- 1Click “Choose video” or drag your MKV file onto the page.
- 2Click “Convert to MP4”.
- 3Download your MP4.
Why MKV won't play
MKV is a container that can hold many formats. MP4 with H.264 video and AAC audio is the version nearly every device understands, so that's what you get.
Extra audio tracks and subtitles
MKV files can hold several audio and subtitle tracks. The MP4 keeps the main audio track; other tracks aren't carried over.
Frequently asked questions
- Why didn't my MKV open?
- Your browser has to be able to decode the video inside. If it can't, you'll see a message, and a newer version of Chrome or Edge usually helps.
- Is there a size limit?
- There's no fixed limit, but very large files need a lot of memory, because your own device does the work.
- Is my file uploaded?
- No. It's converted in your browser.