🎬 Video Formats

Convert MP4 to MKV

To convert MP4 to MKV: open the tool, choose your file, then download the result. Everything runs in your browser and your file is never uploaded to a server.

Ready to convert MP4 to MKV?

Open the MP4 to MKV converter

Files are processed on your device — no upload, no tracking of their content.

How to convert

  1. Open the converter with the button above.
  2. Choose your MP4 file or drag it into the drop zone.
  3. Check the target format is MKV and adjust quality if the option appears.
  4. Click convert, then download the result.

MP4 or MKV?

MP4 vs MKV
FormatCompressionBest for
MP4Lossythe most compatible format for phones and websites
MKVLossymovie files with multiple audio tracks and subtitles

Frequently asked questions

How do I convert MP4 to MKV?

Open the converter with the button above. Choose your MP4 file or drag it into the drop zone. Check the target format is MKV and adjust quality if the option appears. Click convert, then download the result.

Does quality suffer when converting MP4 to MKV?

MKV is a lossy format; choose a high quality setting in the tool so differences stay hard to notice.

What is the difference between MP4 and MKV?

MP4: the most compatible format for phones and websites. MKV: movie files with multiple audio tracks and subtitles.

Is my file uploaded to a server?

No. The conversion runs entirely in your browser on your device; your file never leaves it.

Related conversions

Reverse: MKV to MP4

MP4 to other formats

MP4 to AVIMP4 to WebMMP4 to GIFMP4 to MP3

All Video Formats conversions · MP4 to MKV tool

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