Decant

Convert MKV to MP4

Convert MKV files to MP4 in your browser.

Drop files here

or paste them in. Whole folders work too.

  • Nothing is uploaded
  • Works offline
  • Free and open source

How to convert MKV to MP4

  1. Choose your MKV files, or drop them anywhere on this page.

  2. Check that MP4 is selected, and change the settings if you need to.

  3. Select Convert, then save your MP4 files.

About MKV and MP4

MKV

MKV (Matroska) is a flexible video container that can hold several audio and subtitle tracks. It’s common for films, but many devices won’t play it.

MP4

MP4 is the most widely supported video format. It plays on phones, in browsers and on TVs, and opens in almost every editing app.

Questions

How do I convert MKV to MP4?
Choose your MKV files or drop them on this page, check that MP4 is selected, then select Convert and save the result. It works the same on a phone or a computer.
Is it safe to convert MKV to MP4 here?
Yes. The conversion runs in your browser, so your MKV files are never uploaded, stored or logged.
What should I know about converting MKV to MP4?
When the streams inside are H.264 and AAC, Decant repackages them without re-encoding, so the conversion is near-instant and lossless.
Can I convert several MKV files at once?
Yes. Add as many as you like and they convert together. Save each result on its own, or all of them as one ZIP.

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