Convert MP4 to MKV
Free, fast and private. Drop your MP4 file and download it as MKV in seconds.
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⚡ 1 file converted
Private by design
Files are deleted the moment your conversion finishes. We never look at them.
500+ conversions
MP4, MP3, HEIC, JPG, PDF, DOCX, XLSX, EPUB and many more.
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Just drop a file and download the result. Nothing to install.
MP4 to MKV: questions
How do I convert MP4 to MKV?
Drop your MP4 file on this page (or click to choose it), make sure MKV is selected, and press Convert. Your MKV file is ready to download in seconds.
Is the MP4 to MKV converter free?
Yes. zapvert is free with no sign-up and no watermark, for files up to 100 MB.
Are my files safe?
Files are processed only to run your conversion and deleted from our server immediately afterwards. We never look at, keep or share them.
What is a MP4 file?
MP4 is the most widely supported video format, playable on phones, browsers, TVs and social media.
What is a MKV file?
MKV is Matroska, a flexible video container that can hold many audio and subtitle tracks.