Matroska Video
An open container that can hold almost any codec plus multiple audio and subtitle tracks.
- Type
- video
- Best for
- archiving films with several tracks
No account · no upload · no watermark
Convert MKV to MP4. Completely free.
Drop your MKV and get an MP4 back, right here in this tab. Your own computer does the work, so nothing gets uploaded, and there's no paid version.
MKV to MP4 converter
MPEG-4 Part 14
The most widely supported video format, playing on nearly every phone, TV, browser and editor.
- Type
- video
- Best for
- sharing and everyday playback
What to expect
If the video and audio inside are already something MP4 can hold, they're copied across with no quality loss, which takes seconds. Otherwise they're re-encoded, on your graphics hardware where possible and with FFmpeg in the tab where not.
How to convert MKV to MP4
- Drop your MKV on this page, or choose it from your device.
- MP4 is already selected. Adjust quality, size or trim if you want to, and each option shows the size it will produce.
- Press Convert, watch it work, then download the result.
Questions
Is this MKV to MP4 converter really free?
Yes, completely. Every tool and every format is free, and there's no paid version, account, watermark or daily limit.
Do my files get uploaded?
No. Your browser does the work on your own device, so your files stay with you. Closing the tab clears them from memory.
Can I convert several files at once?
Yes. Drop as many as you like, and the results can be downloaded together as a ZIP.
Does it work on a phone?
Yes, in a current mobile browser. Large files are limited by how much memory your device can spare.
What should I know about MKV to MP4?
If the video and audio inside are already something MP4 can hold, they're copied across with no quality loss, which takes seconds. Otherwise they're re-encoded, on your graphics hardware where possible and with FFmpeg in the tab where not.
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Ready to convert your MKV?
- Completely free
- Nothing uploaded
- No account
- No watermark