WebFaz Video Converter

MKV to MP4

PT

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MKV to MP4: convert to the format accepted on phones and TVs

MKV is common in recordings and downloads, but not every phone, TV or platform recognizes it. Convert to MP4 and watch or send it anywhere. If the video already uses H.264 and AAC, the conversion only swaps the container and is very fast.

Drag your video here or click to choose

MKV — one file at a time

⚡ 100% private

How to do it, step by step

  1. Select the MKV file.
  2. Keep the Quality on Auto.
  3. Click Convert video.
  4. Download the MP4.

See where to click, with an image of the tool →

When this is useful

Recordings from screen-capture and game programs

Many recorders save as MKV; MP4 is easier to share.

Watch on a TV or phone

Devices usually accept MP4 more easily.

Tips for a good result

  • MKV from recorders usually has H.264, and the swap to MP4 is fast.
  • For a smaller file, use WebFaz Video Compressor afterwards.

What this tool does not do

  • Embedded subtitles and extra audio tracks from the MKV are not guaranteed in the new file: check the result.
  • Codecs other than H.264 require re-encoding, which is slower.
  • One video at a time.
  • The new file carries the “WebFaz.com” credit in the metadata (comment and artist).

Frequently asked questions

Does the conversion lose quality?
Not when it only swaps the container (Auto quality and compatible codecs). With re-encoding, there is some loss.
What about the MKV’s subtitles?
They are not guaranteed in the generated MP4. To work with subtitles, see WebFaz Subtitles.

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Text written by Marcelo Amantino · updated October 18, 2026 · who we are