Is it safe to convert MKV to MP4 here?

Yes — your .mkv file is converted entirely on your device. It is never uploaded anywhere.

Will the converted .mp4 file lose quality?

We use ffmpeg's standard settings for this pair, matching quality you'd get from a desktop tool.

Is there a file size limit?

Files up to 500MB are supported. No account required.

Convert MKV to MP4

Convert Matroska MKV files into a widely-supported MP4 container.

Drop a .mkv file or click to browse

Max file size 500MB • No Account Required • Files Never Touch a Server

File signature verified before conversion — never uploaded

About converting MKV to MP4

MKV (.mkv) files can be converted to MP4 entirely in your browser — no software to install, no file upload, and no account required. The conversion runs on a WebAssembly build of ffmpeg directly on your device.

FAQ

Is it safe to convert MKV to MP4 here?: Yes — your .mkv file is converted entirely on your device. It is never uploaded anywhere.
Will the converted .mp4 file lose quality?: We use ffmpeg's standard settings for this pair, matching quality you'd get from a desktop tool.
Is there a file size limit?: Files up to 500MB are supported. No account required.

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