Convert AVI to MKV — Free Online Converter
Convert Audio Video Interleave (.avi) to Matroska Video (.mkv) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
About AVI to MKV Conversion
AVI (Audio Video Interleave) and MKV (Matroska Video) are both flexible container formats, but MKV is vastly more capable. While AVI's RIFF structure limits it to a single video track, a single audio track (in basic AVI), and no native subtitle support, MKV can hold unlimited video, audio, and subtitle tracks with full metadata, chapters, and attachments. Converting AVI to MKV repackages the content in a modern container that supports every codec imaginable — H.264, H.265, VP9, AV1, FLAC, DTS, and more.
Why Convert AVI to MKV?
MKV eliminates every limitation of AVI. If your AVI files have subtitle files (.srt, .ass) that you want to embed, multiple audio tracks to preserve, or chapters to add, MKV is the ideal container. MKV also removes AVI's original 2 GB file size limit and supports modern features like ordered chapters, segment linking, and high-precision timestamps. Media server software (Plex, Jellyfin, Kodi) handles MKV natively.
Common Use Cases
- Repackaging AVI movie files with embedded subtitles in multiple languages