MP4 to MKV
Convert MP4 video to MKV online — free, no watermark.
About MP4 to MKV
MP4 to MKV converts your MP4 videos into MKV. MP4 plays on every phone, TV, WhatsApp, Instagram and YouTube; MKV (Matroska) holds high-quality video with several audio tracks and subtitles, common for movies and downloads.
- Select your files
- Choose options
- Press “Convert to MKV”
- Download
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More about MP4 to MKV
Convert to MKV for keeping multiple audio tracks and subtitles, or VLC and media players. Most MP4 files can be repackaged into MKV without re-encoding — done in seconds with no quality loss.
Tips
- Keep Quality on “Same” for the fastest MP4 to MKV conversion.
- No watermark, no signup. Files are deleted from our server within an hour.
Also called: MP4 से MKV · MP4 থেকে MKV
FAQ
How long does MP4 to MKV take?
Usually a few seconds when the video can be repackaged; re-encoding takes about as long as the video plays, or less.
Will my MKV have sound?
Yes — the sound is kept unless you turn “Keep sound” off.
Is there a size limit?
About 95 MB per video.
Is MP4 to MKV free?
Yes. MP4 to MKV is completely free with no signup, no watermark and no daily limit for normal use (a fair-use limit protects the server from abuse).
Is it safe to use MP4 to MKV?
Yes. Files are sent over HTTPS, processed on our own server and deleted automatically — immediately after processing and in any case within 1 hour.
Which files can I use?
MP4 — you can select several files at once.