MP4 to MKV
Convert your MP4 files to MKV online, free and in seconds. Just upload, and the file is converted right in your browser — no software to install and no account needed.
Convert your MP4 files to MKV online, free and in seconds. Just upload, and the file is converted right in your browser — no software to install and no account needed.
Upload your MP4 file — drag and drop it or click to browse. You can add several at once.
MKV is already selected as the output format, so there's nothing to configure.
Click Convert and download your new MKV file.
MP4 is the most widely supported video format in the world. It packs high-quality video and audio into a compact file that plays on virtually every device, browser and app, which makes it the safe default for sharing and uploading.
MP4 plays everywhere: any browser, phone, smart TV, and the default video player on Windows, macOS, Android and iOS.
MKV (Matroska) is a flexible open container that holds high-definition video, multiple audio tracks and subtitles in one file. It is popular for movies and archiving, but is not natively supported by every device or browser.
MKV plays in VLC and most modern media players; some phones, browsers and TVs need it converted to MP4 first.