How to convert AVI to MKV
- Add your .AVI file - drop it in the box above or click to browse.
- Convert it to .MKV in a few seconds.
- Download your new .MKV file.
What to expect
- Remuxing with
-c copy(FFmpeg) or MKVToolNix copies video and audio data unchanged - quality and file size stay the same. - MKV supports soft subtitle tracks that AVI cannot; embed an
.srtalongside your video by passing it as a second input to FFmpeg or adding it in MKVToolNix before muxing. - Re-encoding tools like HandBrake can shrink the file but take much longer and reduce quality - only use them if a smaller file is the goal.
Frequently asked questions
Does converting AVI to MKV reduce quality?
No, if you remux using FFmpeg with
-c copy or MKVToolNix - both copy the encoded streams without modification. Quality loss only occurs if you explicitly re-encode.Will the MKV file be smaller than the AVI?
Not from remuxing - video and audio data is identical, so file size stays nearly the same. To shrink the file you must re-encode to H.264 or H.265, which is a separate step.
Can I add subtitles during conversion?
Yes - FFmpeg accepts a subtitle file alongside the AVI input, and MKVToolNix lets you add subtitle tracks before muxing, embedding them as selectable tracks in the output
.mkv.Do AVI files larger than 2 GB work?
Yes - large AVI files using the OpenDML extension are read correctly by FFmpeg and produce a properly seekable
.mkv.Programs that convert AVI: Miro Video Converter · HandBrake · Any Video Converter FREE · Aimersoft iTransfer for Windows · AviDemux · ConvertXtoDVD · Free Studio · Freemake Video Converter
