Convert MKV to MP4
Convert Matroska (MKV) files to MP4 for maximum device compatibility.
Files are processed temporarily and deleted automatically. We keep no permanent copies.
How it works
- Upload a file.
- Choose the format and quality.
- Convert and download the result.
Where MKV files come from - and why devices reject them
MKV (Matroska) is an open container beloved by power users: screen recorders like OBS write it because it survives crashes, and archived video often uses it because it can hold several audio tracks and subtitle streams in one file. That flexibility is exactly what everyday devices dislike - many smart TVs, phones, tablets and editing apps either refuse to open MKV or stumble over it.
MP4 trades that flexibility for universal support. Converting your MKV gives you a file that plays natively on essentially every screen and imports cleanly into any editor, while the picture itself stays the same footage you recorded.
The OBS recording that your editor won't open
If you record gameplay, tutorials or streams with OBS, you've met this exact problem: OBS writes MKV by default (so a crash doesn't destroy hours of recording), and then your editing software shrugs at the file. Converting the recording to MP4 is the missing step between recording and editing.
One honest note about extra tracks: MP4 is a simpler container than MKV. The conversion carries over the video and the main audio track, but secondary audio tracks and embedded subtitle streams may not survive the trip. If your recording has a separate mic track you need, mix it down or export it before converting.
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FAQ
Does converting MKV to MP4 lose quality?
Resolution and frame rate are preserved, and for typical recordings the output looks identical to the source. Keep the original MKV as your master if the recording is irreplaceable.
What happens to subtitles and extra audio tracks?
MP4 is a simpler container, so the conversion keeps the video and the main audio track. Embedded subtitle streams and secondary audio tracks may not carry over - if you need subtitles visible, burn them into the picture with an editor first.
Why does OBS record MKV instead of MP4?
Because MKV survives interruptions: if the app or PC crashes mid-recording, the file stays playable up to that point, while an interrupted MP4 is often corrupt. Record in MKV for safety, then convert here for compatibility.
Is my recording stored on your servers?
No. Files are processed temporarily and deleted automatically after conversion, and download links expire on their own. Save the MP4 to your device as soon as it's ready.
Can I convert large MKV recordings?
Yes - longer recordings simply take longer to upload and process, so a stable connection helps. The conversion runs one file at a time, and there's no cost or daily cap on how many you run.