Convert MKV to MP4 Online
MKV and MP4 serve different purposes. Convert MKV to MP4 here when you need streaming, social media, mobile playback, archiving everyday video.
How to convert MKV to MP4
- Upload your MKV file. Drag it onto the box above or click to browse. Files up to 200 MB are accepted.
- Choose MP4 as the output. The target format is pre-selected on this page — just press “Convert now”.
- Download the result. Conversion runs on our own server and the download starts as soon as it is ready. Your files are deleted automatically.
Why convert MKV to MP4?
People convert MKV to MP4 mainly for compatibility. Supported by VLC, mpv, Plex and most desktop players, but not natively by some mobile devices. MP4, by contrast, is built for streaming, social media, mobile playback, archiving everyday video, and near-universal support. Typically pairs H.264/H.265 video with AAC audio.
MKV vs MP4: key differences
| MKV | MP4 | |
|---|---|---|
| File type | open container | lossy container |
| Typical use | movies, TV rips, multi-audio and multi-subtitle releases | streaming, social media, mobile playback, archiving everyday video |
| Compatibility | Supported by VLC, mpv, Plex and most desktop players, but not natively by some mobile devices. | Near-universal support. Typically pairs H.264/H.265 video with AAC audio. |
Tips for a clean MKV to MP4 conversion
- Supported by VLC, mpv, Plex and most desktop players, but not natively by some mobile devices.
- Use the highest-quality source MKV you have — converting a compressed file again cannot restore lost detail.
- If you only need a smaller file, try a lower resolution or bitrate instead of a different format.
- Keep the original MKV until you have checked the converted MP4 opens the way you expect.
Frequently asked questions
How do I convert MKV to MP4?
Upload your MKV file to the converter on this page, make sure MP4 is selected as the output format and click “Convert now”. When the conversion finishes the download starts automatically.
Is this MKV to MP4 converter free?
Yes — it is completely free and needs no account. Files up to 200 MB are accepted, and heavy use is rate-limited so the service stays available for everyone.
Will converting MKV to MP4 reduce quality?
MP4 uses lossy compression, so the converted file is re-encoded. Quality loss is minimal at sensible settings, but keep the original MKV if you may need to convert again later.
What is a MKV file?
MKV is a flexible open-source container that can hold unlimited video, audio, subtitle and chapter tracks. Its technical name is Matroska Video and it is typically used for movies, TV rips, multi-audio and multi-subtitle releases.
What is a MP4 file?
MP4 is the universal video container, playable on virtually every device, browser, phone and smart TV. Its technical name is MPEG-4 Part 14 and it is typically used for streaming, social media, mobile playback, archiving everyday video.
Can I convert MKV to MP4 on my phone?
Yes. The converter runs in the browser on Android, iOS, Windows, macOS and Linux — no app installation is required.
Are my files kept on the server?
No. Uploaded files and converted results are deleted automatically a short time after the conversion finishes.