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MP4 to MKV

Convert MPEG-4 Video (MP4) videos to Matroska Video (MKV) for playback on any device. Adjust resolution, quality and frame rate, or remove the audio.

Drop your files here

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Up to 100 MB per file · 5 files at once

Tip: you can also paste files with Ctrl + V

Secure transfer. Files are deleted automatically after 60 minutes. 25 conversions left today

How it works

  1. 1

    Add your files

    Drag and drop files into the box or choose them from your device.

  2. 2

    Choose your settings

    Pick the output format and options, then click “Convert”.

  3. 3

    Download

    Download your result instantly or share a temporary link.

MP4 — MPEG-4 Video

MP4 (MPEG-4 Video) is a video format. Convert it to play on more devices, reduce its size or extract the audio.

MKV — Matroska Video

MKV (Matroska Video) is a video format. Convert it to play on more devices, reduce its size or extract the audio.

  • Private & secure. Encrypted transfer and automatic deletion.
  • Fast. Optimised engines process files in seconds.
  • Free. No registration required for core tools.
  • High quality. Fine-tune quality, resolution and more.