Convert AVI to MKV
AVI is great for older Windows software, DVD players and legacy cameras, but MKV is the better choice for movies with multiple audio tracks and subtitles. Convert AVI to MKV in seconds, right in your browser.
- No upload — 100% private
- Fast, lossless when possible
- Free & unlimited
- Works on iPhone & Android
Keep this tab open — the conversion runs on your device, nothing is uploaded.
Add more files above to keep converting.
How to convert AVI to MKV
- 1
Tap Choose files and select one or more AVI files (or drag them in).
- 2
Check that MKV is selected. Use Advanced options for resolution, size or trimming.
- 3
Press Convert. Everything happens on your device — no upload, no waiting in a queue.
- 4
Your MKV downloads automatically. Converting several files? Grab them all as a ZIP.
AVI vs MKV
Both formats are lossy, so the video is re-encoded once. Pick High quality to keep it as close to the original as possible, or Small for the smallest file.
| AVI | MKV | |
|---|---|---|
| Full name | Audio Video Interleave | Matroska Video |
| Type | Video | Video |
| Compression | Lossy | Lossy |
| Developed by | Microsoft | Matroska.org |
| Introduced | 1992 | 2002 |
| Plays on iPhone | ✕ No | ✕ No |
| Plays on Android | ◐ Partly / with an app | ◐ Partly / with an app |
| Plays on Windows | ✓ Yes | ✓ Yes |
| Plays on Mac | ◐ Partly / with an app | ◐ Partly / with an app |
About AVI and MKV
AVI: AVI is Microsoft's classic video format from the Windows 95 era. It is still used by older cameras, DVD players and Windows software.
MKV: MKV is a flexible open container that can hold unlimited video, audio and subtitle tracks. It is popular for movies and anime but isn't supported by iPhone or most TVs out of the box.
Frequently asked questions
How do I convert AVI to MKV on my phone?
Will converting AVI to MKV reduce quality?
Is this AVI to MKV converter free?
Are my files uploaded to a server?
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