MKV to MP4 converter
Make MKV videos play on phones, TVs and editors as MP4.
or drop them here, or paste them
Nothing is uploaded.
About MKV to MP4
MKV is a flexible container that many phones, smart TVs and video editors don't accept. MP4 is understood almost everywhere.
When the video and sound inside the MKV fit in an MP4, they are moved across unchanged; otherwise they are re-encoded to H.264 and AAC. The conversion runs on your device.
MKV files often hold several sound tracks and subtitles. The MP4 keeps the main video and the first sound track, which is what TVs and phones play by default. Extra audio languages and subtitle tracks are left out.
When the streams can be copied, a full film converts in a minute or less and keeps its full quality. Re-encoding takes longer and depends on your device; keep the page open until it's done. Your browser does all the work, so the video never has to be uploaded, however large it is.
You can convert several MKV files at once and download them together as a ZIP. If the MKV holds a video format your browser can't decode, the page says so instead of producing a broken file.
Questions and answers
The main video and the first audio track are converted. Subtitle tracks and extra languages are not carried over.
Some MKV files use codecs browsers can't decode, such as certain surround-sound formats. Try a current Chrome or Edge.
No. Your browser reads and converts the video locally.