How to convert AVI to Matroska (MKV)
- 1
Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
- 2
Convert AVI to Matroska (MKV)
NexMedia converts AVI to Matroska (MKV) on its own servers. Processing time depends on the file size and how busy the queue is.
- 3
Download the converted file
When the conversion finishes, the download appears on this page. Your converted file is kept for 2 hours, then deleted.
About AVI
AVI (Audio Video Interleave) is a container format Microsoft introduced in 1992 for video on Windows.
Older cameras, Windows software and video collections from the 1990s and 2000s.
AVI predates modern codecs and has no native support for features such as variable frame rate, so it is rarely used for new video.
Convert AVI to MKV online free, no account required — MKV is a flexible open container for video with any number of audio and subtitle tracks.
Change AVI to MKV without losing quality — convert AVI to MKV free in your browser.
Why is my AVI file so much bigger than modern video? The container predates efficient codecs like H.264, so an hour of video can take many gigabytes that an MP4 would store in a fraction of the space.
About Matroska (MKV)
Matroska (MKV) is an open container format that can hold almost any video and audio codec, any number of audio and subtitle tracks, chapters and attachments.
It is popular for films and series with several audio languages and subtitle tracks, and for archiving video.
Many phones, browsers and TVs do not play MKV files directly, even when they support the codecs inside.
Why convert video to MKV? When one file must carry several audio languages, subtitle tracks and chapters, no container holds them as flexibly.
What changes when you convert AVI to MKV
- The AVI is re-encoded into MKV at the default quality settings, so the result looks close to the original but is not bit-identical.
Settings you can change
Before you convert AVI to MKV, you can adjust: Video codec, Rate control, Quality (CRF), Video bitrate, Resolution, Width, Height, Scale fit, Frame rate, Encoder preset, Audio codec, Audio bitrate, Trim start, Trim duration, and Remove metadata.
Limits
Each plan sets a maximum file size and a number of conversions per day, and video and audio files also have a maximum length. Guests can convert files up to 100 megabytes and 5 per day; a free account raises this to 500 megabytes and 25 per day; paid plans go up to 100 gigabytes.
Your converted MKV file is kept for 2 hours, then deleted.
AVI to MKV: questions and answers
Does converting AVI to MKV reduce quality?
The AVI is re-encoded into MKV at the default quality settings, so the result looks close to the original but is not bit-identical.
What is the difference between AVI and MKV?
AVI is Microsoft's older Windows video container. MKV is a flexible open container for video with any number of audio and subtitle tracks.
Can I change the settings when converting AVI to MKV?
Before you convert AVI to MKV, you can adjust: Video codec, Rate control, Quality (CRF), Video bitrate, Resolution, Width, Height, Scale fit, Frame rate, Encoder preset, Audio codec, Audio bitrate, Trim start, Trim duration, and Remove metadata.
Do I need an account to convert AVI to MKV?
No. You can convert AVI to MKV without an account; signing in raises the file-size and daily limits.
How long is my converted MKV file kept?
The MKV file you convert from AVI is kept for 2 hours, then deleted automatically.
When I convert AVI to MKV, is the video re-encoded?
The AVI is re-encoded into MKV at the default quality settings, so the result looks close to the original but is not bit-identical.
Will converting AVI to MKV change my original file?
No. The conversion reads your AVI and writes a new MKV file, leaving your original AVI file untouched.