MKV to MP4
Get a Matroska file into a container that TVs, phones and editors will actually open.
Your file
Drop a file here, or click to choose
It stays on this device. Nothing is sent anywhere.
Settings
What gets lost
MKV can hold several audio tracks, several subtitle tracks and chapters. MP4 handles one audio track cleanly here, so extra tracks are dropped in conversion and the first of each is kept. If the MKV carries subtitles you want to keep, extract them and use the subtitle burner.
The video itself is usually h.264 or h.265 already, so the picture survives the trip well.
Common questions
Why is my MKV file so large to start with?
MKV is often used for high-bitrate rips and archives. The container is not the reason, the bitrate inside it is.
Can I keep the subtitles?
Not as a separate switchable track. Burn them into the picture instead.