AVI to MKV
Convert your AVI 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 AVI 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 AVI 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.
AVI is a classic Microsoft video format from the 1990s. It offers broad compatibility and good quality but large, inefficient files, so it is mostly replaced by MP4 today — though it is still common in older archives.
AVI opens in Windows Media Player, VLC and most desktop players; for phones and browsers, converting to MP4 is the reliable choice.
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.