AVI vs MP4
A quick, plain-English comparison of the AVI and MP4 file formats — and how to convert between them, free and in your browser.
| AVI | MP4 | |
|---|---|---|
| Category | video | video |
| Extension | .avi | .mp4 |
| MIME type | video/x-msvideo | video/mp4 |
| Converts to | 31 formats | 31 formats |
| Direction here | read & write | read & write |
Convert between AVI and MP4
AVI vs MP4: frequently asked questions
What's the difference between AVI and MP4?
Microsoft Audio Video Interleave container. MPEG-4 video container; the web/mobile default.
Should I use AVI or MP4?
Both are video formats — the right one depends on compatibility, quality and file size for your use. Whichever you have, you can convert it to the other below in seconds.
How do I convert AVI to MP4?
Open the AVI-to-MP4 converter, drop your AVI file in, and download the MP4. We auto-detect the real format from the file's bytes, so a mislabeled file still works.