Free · No signup · No watermark

Convert MKV to MP4

MKV is the favorite container of OBS, HandBrake, and downloaders — flexible, but phones and social platforms don't speak it. Convert to MP4 (H.264 + AAC) here, and shrink to an exact size in the same pass if you need to.

Drop your video here

or

MKV files — processed 100% on your device

Target size

🔒 Your video never leaves your device. No upload, no signup, no watermark.

Convert MKV to MP4 in 3 steps

1

Drop your MKV file in

Drag and drop any MKV file into the tool above. It never leaves your browser — no upload, no queue, no account.

2

Convert to MP4

The tool re-encodes to MP4 at a generous 500 MB quality budget — or pick an exact smaller size if you also need the file under a limit.

3

Download your MP4

The MP4 downloads straight to your device, with faststart enabled so it plays and uploads cleanly.

Why convert MKV to MP4?

MKV can hold almost anything — multiple audio tracks, subtitles, chapters — which is why recording and ripping tools love it. That flexibility is exactly why players and platforms don't: phones, editors, and upload forms expect the simpler MP4 container.

MP4 with H.264 video and AAC audio plays on every phone, every browser, and every platform. Converting is the price of leaving the desktop video world.

One honest limitation: this converts the main video and audio track. Extra audio tracks and subtitle tracks don't carry over — if you need those, keep the MKV as your archive and use the MP4 for sharing.

FAQ

Do subtitles and extra audio tracks carry over?

No — this converts the main video and audio track. Extra tracks and subtitles are dropped. Keep the MKV as your archive and use the MP4 for sharing.

Will converting MKV to MP4 lose quality?

Barely, at the default 500 MB budget: the video is re-encoded with a generous bitrate, so the result is visually near-identical to the original.

Is my video uploaded anywhere?

No. Everything runs in your browser. No upload, no account, no watermark.