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How to Convert MKV to MP4 on Windows

A practical guide to converting MKV to MP4 while preserving quality where possible and improving playback compatibility.

What matters

Start by checking whether the MKV tracks are already suitable for MP4.

When they are, remuxing can change only the container.

Step-by-step

  1. Step 1When they are not, choose a target video/audio codec that the destination can decode.
  2. Step 2Test the output on the devices or applications that matter before deleting the source.

Keep the workflow local

FastConvert is positioned as a local Windows media converter. The conversion itself is performed through FFmpeg on the machine rather than sending the media to a browser upload service.

Use FastConvert locally. Download for Windows or browse the format guide.