Convert AVI to MKV
Free, fast AVI-to-MKV conversion.
Video and audio are processed with ffmpeg in your browser — large files are slow and use a lot of memory. Keep files under a few hundred MB for best results.
About the AVI and MKV formats
AVI. AVI is a legacy Microsoft video container with broad but dated support.
MKV. Matroska (MKV) is a flexible open container holding video, audio and subtitles.
Frequently asked questions
How do I convert AVI to MKV?
Drop your AVI files into the box above and click Convert. The MKV file is generated instantly and ready to download.
Will the quality stay the same?
MKV keeps full quality, so your converted file looks identical to the original.
Is AVI to MKV conversion free?
Completely free, with no sign-up, watermarks or file-size paywalls.