MKV to MP4
Turn MKV files into MP4, ideal for sharing and playback on every device. Fast, free and completely private.
- Processed locally — your files never leave your device
- Free, no sign-up
- No file limits
How to use MKV to MP4
- 1
Drop your MKV file into the box above or click to choose it.
- 2
Check that MP4 is selected as the output format.
- 3
Click Convert, then download your MP4 file.
Features
- No uploadYour MKV file is converted locally — nothing is sent to a server.
- Lossless when possibleWhen the codecs are compatible, streams are copied without re-encoding, so conversion is instant.
- Free, no watermarkNo sign-up, no watermark and no daily limits.
Frequently asked questions
Why convert MKV to MP4?
MKV is best for keeping multiple audio and subtitle tracks, while MP4 is ideal for sharing and playback on every device.
Is this MKV to MP4 converter safe?
Yes. The conversion runs entirely in your browser using ffmpeg compiled to WebAssembly, so your video stays private.
How long does it take?
Compatible files convert almost instantly. Files that need re-encoding take roughly as long as the media plays, depending on your device.