MKV to MP4

MKV to MP4 Converter

Convert MKV videos to MP4 in your browser without sending the file to a server.

MKV conversion workspace

Create a more compatible MP4 from an MKV source.

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How it works

1 Select an MKV file.
2 Export an MP4 locally.
3 Download the converted video.

FAQ

Is my file uploaded anywhere?

No. The conversion runs in your browser with WebAssembly, so the selected file stays on your device.

Why can conversion take a while?

Large videos need to be decoded and encoded locally. Keep the tab open while the browser finishes the export.

Does the tool add a watermark?

No. The exported file is watermark-free.

Will all MKV tracks be kept?

The browser export focuses on the primary video and audio streams for a simple MP4 output.

Want professional polish?

The browser tools are great for quick format work. Aufzeichna's desktop app is built for polished screen recordings with smooth cursor motion, cinematic zoom, and export control.

Check out the desktop app