MKV to MP4 Converter
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Free MKV to MP4 Converter

Convert MKV (Matroska) videos to MP4 right in your browser. The video is converted to H.264 with AAC audio, the MP4 that almost every phone, TV, editor and upload form accepts. No sign-up, no watermark, and your video never leaves your device.

No file handy?

Drop your MKV video here

or click to browse — Matroska video, including OBS recordings

Your video never leaves your device. The conversion runs entirely in your browser. Privacy policy.

Large videos take a few minutes to convert. Keep this tab open until it finishes.

Need a different format? Use the all-in-one converter — video, audio and image formats in one tool.

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About MKV to MP4 conversion

MKV (Matroska) is an open video format used for downloads, game and screen recordings from tools like OBS, and files with several audio or subtitle tracks. Plenty of places will not take it: iPhones, many smart TVs, some editing apps and most upload forms want MP4. Converting MKV to MP4 here re-encodes the video to H.264 with AAC audio, which is the MP4 almost everything plays.

How to convert MKV to MP4

What people use it for

Good to know: large videos take a few minutes, and 1080p or 4K takes longer. The MP4 keeps one audio track, and subtitle tracks inside the MKV are not carried over.

Why SnipSound

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Frequently Asked Questions

How do I convert MKV to MP4?▼
Drop your MKV file onto the page and click Convert to MP4. The video is converted to H.264 with AAC audio, then you preview the MP4 and download it. Everything runs in your browser, and your video never leaves your device.
Does converting MKV to MP4 lose quality?▼
The video is re-encoded, so it is not a bit-for-bit copy, but it stays close to the original for normal viewing. The MP4 may be larger or smaller than the MKV depending on how the original was compressed.
How long does it take?▼
Small clips take seconds. Because the video is re-encoded, large files take a few minutes, and 1080p or 4K video takes longer than lower resolutions. Keep the tab open until it finishes.
What happens to subtitles and extra audio tracks?▼
The MP4 keeps one audio track. Subtitle tracks inside the MKV are not carried over, so if you need them, keep the MKV or export the subtitles separately.
Is my video uploaded to a server?▼
No. The conversion runs on your own device using FFmpeg compiled to WebAssembly, so your video never leaves your device.
Is there a file size limit?▼
No fixed cap. In our testing a 1 GB file converted on a desktop computer and on a mid-range Android phone. iPhones give browsers less memory, so very large files may fail there.