Convert MKV to MP4
The container TVs and phones refuse, repackaged or re-encoded as the one they accept. Often instant.
Runs in your browser. Your file never leaves your computer.
- H.264 + AACRepackaged, lossless, fast
- Other codecsRe-encoded, estimate first
- SubtitlesNot carried into the MP4
- ResultTVs and phones stop arguing
MKV holds anything, which is its glory and its curse: players, TVs and phones often refuse the container despite happily supporting what is inside. When the tracks are H.264 and AAC, conversion is a pure repackage, lossless and near-instant. Other combinations re-encode to that universal pairing, with time expectations shown honestly upfront. Subtitles built into the MKV do not carry into MP4 here; the picture and sound do, streamed to disk as they finish.
Questions
How do I know if mine will be instant?
Drop it: the page reads the tracks and says. H.264 video with AAC audio takes the instant path; the suggestion line explains either way.
What happens to embedded subtitles?
They are not carried over. Extract subtitles with a dedicated tool if you need them; picture and sound convert fine.
Is a large MKV a problem for a browser?
No, it streams through; multi-gigabyte files convert without loading whole into memory.
Related conversions
- MKV to M4AConcerts, talks and rips carry fine soundtracks; this lifts them into an M4A without touching the video.
- MKV to WebMContent bound for browser playback, re-encoded with hardware VP9 or AV1 where the machine offers it.
- WebP to MP4A silent video that loops like the animation but weighs a fraction and plays in every player and timeline.
- GIF to MP4The classic upgrade. Video codecs were built for motion; the same clip drops dramatically and plays everywhere.
- MOV to MP4iPhone and Mac footage made universal. Already H.264? It repackages in seconds without touching a frame.
- WebM to MP4Screen recordings and downloads that only browsers open, moved to the container everything opens.
Part of convert video in your browser. Every other conversion is on the conversions index.