Convert MKV to MP4

Free, private and unlimited. Your file never leaves your device.

Drop your MKV file hereor click to choose a file

MKV won’t play on iPhones, TVs, or in most editors: MP4 plays everywhere. When your MKV already uses MP4-compatible codecs (H.264/AAC, the most common case) the file is remuxed without re-encoding, so conversion is nearly instant and quality is untouched. Otherwise it falls back to a fast re-encode automatically.

How to convert MKV to MP4

  1. Click the box above (or drag & drop) to select your MKV file.
  2. Press “Convert to MP4”. The conversion runs right in your browser.
  3. Download your MP4 file. That’s it: no signup, no watermark.

Why use this converter?

Frequently asked questions

Is this MKV to MP4 converter really free?

Yes. It is completely free with no signup, no watermarks and no conversion limits.

Are my files uploaded to a server?

No. The converter uses WebAssembly to run FFmpeg inside your browser, so your MKV file never leaves your device. That also means there is nothing for us to store or share.

Is there a file size limit?

There is no artificial limit. Because everything runs in your browser’s memory, very large files (over ~1.5 GB) may fail depending on your device.

Do I need to install any software?

No. Everything works in your browser, desktop or mobile. There is nothing to download or install.

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