avi
→mp4
Convert AVI to MP4 — Free, Fast & Private
Convert legacy AVI videos to modern MP4 format. Dramatically reduce file size while improving compatibility with all devices and platforms.
Massive size reductionModern formatNo file limitBatch convert
How to Convert AVI to MP4
- 1
Add your AVI file by dragging or clicking to browse.
- 2
Click Convert — modern MP4 encoding runs in your browser.
- 3
Download your MP4 with better compression and compatibility.
AVI vs MP4 — Format Comparison
| Feature | AVI | MP4 |
|---|---|---|
| Age | Legacy (1992) | Modern (2003+) |
| Compression | Minimal | Efficient |
| File size | Very large | Much smaller |
| Compatibility | Declining | Universal |
| Best for | Legacy | Everything |
When to Convert AVI to MP4
- •Modernizing old videos
- •Reducing file size
- •Sharing legacy footage
- •Streaming compatibility
Frequently Asked Questions
Why convert AVI to MP4?
AVI is old and uncompressed. MP4 is modern, smaller, and plays everywhere. Essential for sharing legacy videos.
How much smaller will the file be?
Often 50–80% smaller. AVI uses little compression; MP4 with H.264 is highly efficient.
Will quality improve?
At high settings, quality can match or exceed AVI at a fraction of the size.
Can I convert old camcorder videos?
Yes. Many old cameras used AVI. Convert to MP4 for modern devices and smaller files.