PriviTools
ESENDEPTFRIT
Local processing

VIDEO & AUDIO

Convert MKV to MP4 locally

Convert MKV containers to MP4 for devices and platforms with wider playback support.

Use this tool
Free support tool — review the result

PriviTools provides this tool at no cost to make everyday tasks easier. Results are generated automatically and may contain errors, omissions or formatting changes. Compare them with the original before signing, filing, sharing or relying on them for an important decision. This tool does not replace professional review or official validation.

🛡️ Local processingYour video is processed in a Web Worker. The FFmpeg runtime loads only when the first conversion starts.Initial limit: 200 MB. Processing time depends on the file and device.
Convert MKV to MP4Convert MKV videos locally without sending the file.

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Compatible MKV conversion

Create an H.264 MP4 with AAC audio for videos that do not play everywhere.

Local privacy

Your file stays on your device. FFmpeg downloads when conversion starts and creates the result locally.

FREQUENTLY ASKED QUESTIONS

Is MKV uploaded?

No. It is processed locally in a Web Worker.

Are subtitles preserved?

The conversion prioritizes video and audio; special tracks may not be retained.

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