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
Upload your .avi file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .mkv file when it's ready.
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.
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.
If the AVI's codecs are MKV-compatible (which they almost always are — MKV accepts virtually every codec), the conversion can be a simple remux: copying the video and audio bitstreams without re-encoding. This is near-instant and produces zero quality loss. If re-encoding is desired (e.g., to convert DivX to H.264), FFmpeg transcodes the streams to the target codecs. MKV's Matroska container uses EBML (Extensible Binary Meta Language) for efficient metadata storage.
When remuxing (stream copying), quality is identical to the original AVI — not a single bit of video or audio data is changed. When transcoding to a new codec, quality depends on the encoding settings. H.264 at CRF 18–22 in MKV produces excellent results that typically exceed the visual quality of the original DivX/XviD AVI.
| Device | AVI | MKV |
|---|---|---|
| Windows PC | Native | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
AVI to MKV conversion unlocks modern container features while preserving or improving quality. Whether you remux for speed or transcode for efficiency, MKV is the superior container for archival and media server playback.
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Οποιοδήποτε πρόγραμμα περιήγησης, οποιαδήποτε συσκευή
| Χαρακτηριστικό | AVI | MKV |
|---|---|---|
| Πλήρες όνομα | Audio Video Interleave | Matroska Video |
| Επέκταση | .avi | .mkv |
| Ιδανικό για | Windows native | Multiple audio tracks |