Upload an MKV (Matroska) video — common for movie rips and recordings with multiple audio/subtitle tracks — and get an MP4 that opens on phones, smart TVs and any player without extra codecs.
Conversion runs on a processing server in a few seconds — nothing to install. MKV often carries video codecs (HEVC, VP9) that MP4 only partially supports, so the tool re-encodes the video to H.264 for guaranteed compatibility.
MKV · up to 200 MB · up to 5 files at once
MKV (Matroska) is an open container used for movie rips and recordings with several audio tracks or subtitles. That flexibility is exactly why smart TVs, iPhones, game consoles and some editors refuse MKV or show a black screen.
This MKV to MP4 converter re-encodes the video to H.264 and carries over the main audio track. MP4 with H.264 plays on almost every player and TV, whatever codec the original used.
HEVC, VP9 or old DivX/Xvid — the output is always H.264.
The primary audio track moves into the MP4 along with the video.
The result opens where the MKV gave a format error.
Add up to 5 files, each up to 200 MB.
MKV is just an envelope. The video inside may be HEVC, VP9 or DivX/Xvid, and the sound DTS, AC3 or FLAC. A device has to support every one of those codecs. If even one is missing, you lose the picture or the sound.
The output gets the main audio track. Extra tracks and subtitles embedded in the MKV aren't moved to MP4 automatically. If you need a different dub, check the file after converting.
MKV almost always holds codecs MP4 can't take directly, so the video is fully re-encoded. Quality stays good, though it isn't an exact copy. A processing service does the work and deletes the file afterwards. The limit is 200 MB per file.
Most likely the TV doesn't support a codec inside the file, such as HEVC or VP9. After conversion to MP4 with H.264 the problem goes away.
No, this tool leaves the resolution alone because its job is compatibility. To get a lighter file, use “Compress video”.
Yes, up to 5 files per batch. Each one must be 200 MB or less.
The daily number is limited. Registered users have a higher limit than guests.