MKV to AVI Converter

Convert MKV (Matroska video) files to AVI online, for free, with nothing to install.

To convert MKV to AVI, select or drop your .mkv file above, check that AVI is chosen as the output, and click Convert. This conversion runs on our server, and your files are deleted 72 hours later.

What is an MKV file?

MKV – Matroska video. MKV (Matroska) is a flexible open container that can hold any number of video, sound and subtitle tracks. Media players love it; phones and some TVs do not. Converting makes a new file: the video is decoded and encoded again, so converting from a format that lost detail never brings it back.

MKV Converter →

What is an AVI file?

AVI – AVI video. AVI is Microsoft's old video container from 1992. Plenty of older cameras, players and editing programs still use it. Converting makes a new file: the video is decoded and encoded again, so converting from a format that lost detail never brings it back.

AVI Converter →

How to convert MKV to AVI

  1. Click Select File, or drop your .mkv files anywhere on this page. You can add several at once.
  2. Check that AVI is chosen as the output format. On this page it is picked for you.
  3. Click Convert. When a file has to go to our server, the button says Upload and convert instead.
  4. Click Download next to each file when it's done.

MKV vs AVI: how they compare

MKVAVI
LayoutMoving pictures and soundMoving pictures and sound
EditableIn video editorsIn video editors
Created byMatroska team, 2002Microsoft, 1992
Best forFilms with several sound tracks and subtitlesOld software and players

Good to know

  • The video is decoded and written as an AVI file by ffmpeg: MPEG-4 pictures and MP3 sound, at a fixed quality. The first picture track and the first sound track are kept; subtitles and other tracks are left out.
  • Pictures wider than 1080p are made 1920 pixels wide. Interlaced video (DVD, TV, camcorders) is deinterlaced.
  • The server converts about as much video as it can in 10 minutes: a long or large video is refused at once with how long it would take, and can be cut shorter first.

Frequently asked questions

Is converting MKV to AVI free?

Yes. Everyone gets 25 free credits a day, with no account needed. Conversions on our server use one credit per started minute of work, so most cost a single credit. Credits reset at midnight UTC.

Are my MKV files uploaded anywhere?

This conversion runs on our server, because converting video needs ffmpeg, which does not run in a browser. Your file is sent over an encrypted connection, and both it and the result are deleted 72 hours after the conversion. The server has no internet access while it works on your file.

How large can the MKV file be?

Up to 1 GB per file. This conversion runs on our server, which accepts files up to that size.

Will the AVI look the same as the MKV?

The picture and sound are decoded and encoded again at a fixed quality, so the AVI looks and sounds very close to the MKV but is not bit for bit the same. Sizes up to 1080p are kept; the first picture track and the first sound track are kept.

Can I convert several MKV files at once?

Yes. Add as many files as you like; they are converted one after another, and each one gets its own Download button.

How long does converting MKV to AVI take?

In our tests a one-minute 1080p video at 8 Mbit/s took about 13 seconds to become an AVI file. Time grows with length and picture size and shrinks for smaller pictures; a video that would need more than about 8 minutes is refused at once, with the time it would take.

Convert MKV to other formats

Convert other videos to AVI

All video formats

Updated