Convert MKV to AVI online in seconds — free, with no sign-up. AVI is lossy and ideal for legacy video; usually converted to MP4 or WebM. Your files are encrypted and deleted automatically after 24 hours.
MKV
Matroska Video — A flexible container that holds multiple audio, video and subtitle tracks.
AVI
Audio Video Interleave — An older Microsoft container with large file sizes and limited modern support.
How to convert MKV to AVI
- 1Upload your MKV file
Click “Choose a file” or drag and drop your MKV file onto the page — no sign-up or email needed.
- 2Convert to AVI
AVI is already selected as the output. Open Options to fine-tune quality if you like, then click Convert.
- 3Download your AVI file
Your AVI file is ready in seconds — click Download to save it. Files are automatically deleted after 24 hours.
MKV vs AVI
| MKV | AVI | |
|---|---|---|
| Full name | Matroska Video | Audio Video Interleave |
| Type | Video | Video |
| Compression | Lossy | Lossy |
| Best for | archiving films with multiple tracks; converted to MP4 for compatibility | legacy video; usually converted to MP4 or WebM |
Frequently asked questions
Does converting MKV to AVI lose quality?
Both MKV and AVI use compression, so re-encoding discards a little more data. For a single conversion the change is virtually invisible; just avoid repeatedly re-converting the same file.
What's the difference between MKV and AVI?
Matroska Video (MKV) is lossy and best for archiving films with multiple tracks; converted to MP4 for compatibility. Audio Video Interleave (AVI) is lossy and best for legacy video; usually converted to MP4 or WebM. Convert MKV to AVI when you need a video for legacy video.
Is the MKV to AVI converter free?
Yes — converting MKV to AVI is completely free. There's no watermark, no sign-up and no email required, and you can convert as many files as you like.
Are my MKV files private and secure?
Yes. Your uploads are encrypted in transit, processed privately, and automatically deleted within 24 hours. We never share, sell or look at your files.
Can I convert MKV to AVI on iPhone, Android, Mac or Windows?
Yes. The converter runs entirely in your browser, so it works on any device — iPhone, iPad, Android, Mac, Windows or Linux — with nothing to download or install.
How long does it take to convert MKV to AVI?
Most files convert in a few seconds. Larger files take a little longer, and your upload speed is usually the limiting factor. There's no queue and no waiting for an email.
What else can I convert MKV files to?
Besides AVI, you can convert MKV to AAC, FLAC, FLV, GIF, JPG, M4A and more — see the full list of MKV conversions below.
Other conversions
Last updated July 2026