SnapMedia

Free online converter

MKV to MP4 Converter

Convert MKV to MP4 — typically OBS recordings — for editors, phones and social networks. If the MKV already holds H.264, it is remuxed in seconds with no quality loss.

No upload

Converted on your device

No sign-up

Free, no daily limit

No watermark

Your file, untouched

Batch

Several files at once

How to convert MKV to MP4

  1. Add your MKV files. Drag them onto the box above or click to choose them. You can add several at once.
  2. Check the target is MP4. It is already selected. Adjust the quality under Options if you want.
  3. Click Convert. The conversion runs in your browser — the file is never uploaded to a server.
  4. Download the MP4. When it finishes, click Download on each file.

When you need this

OBS gameplay and stream recordings headed for YouTube, TikTok or an editor, and films for a TV or phone that does not read MKV.

MKV vs MP4

MKV

A flexible container that can hold almost any codec plus multiple audio and subtitle tracks. Common for films and screen recordings (OBS), rarely accepted by phones or social networks.

Best for: archiving, films with several audio or subtitle tracks, OBS recordings.

MP4

The universal video format. H.264 video with AAC audio in an MP4 plays on every phone, browser, TV and social network.

Best for: sharing, uploading to YouTube, Instagram or TikTok, and playing anywhere.

Will I lose quality?

If the video inside the MKV already uses a codec MP4 supports — H.264 or HEVC, which is what phones, cameras and OBS produce — it is not re-encoded: it is copied into the new container. That takes seconds and the quality is identical. Only an incompatible codec is re-encoded, to high-quality H.264.

Have a link instead of a file?

Paste it into the YouTube MP4 downloader and skip the conversion.

Related conversions

MOV to MP4WEBM to MP4AVI to MP4MP3 to MP4All conversions →

Frequently Asked Questions

How do I convert MKV to MP4?
Drag the MKV file onto the box above, check the target is MP4 and click Convert. As soon as it finishes a Download button appears. Nothing to install, no account needed.
Is it free to convert MKV to MP4?
Yes, completely: no sign-up, no daily limit and no watermark. Your own browser does the conversion, so it costs us nothing and there is no reason to charge for it.
Are my files uploaded to a server?
No. The converter runs inside your browser: the file is read and converted on your device and never leaves it. That is why it is safe for private or work recordings.
Will I lose quality?
If the video inside the MKV already uses a codec MP4 supports — H.264 or HEVC, which is what phones, cameras and OBS produce — it is not re-encoded: it is copied into the new container. That takes seconds and the quality is identical. Only an incompatible codec is re-encoded, to high-quality H.264.
Is there a file size limit?
Up to 1 GB per file. The limit is not a business one but the browser’s: all the work happens in its memory, and above that size some browsers close the tab. On a phone, stay well below it.
Can I convert several files at once?
Yes. Add as many MKV files as you like and they are converted one after another with a single click. Each one can go to a different format.