Convert AVI to MP4 Online Free
Convert legacy AVI videos to modern MP4 format for better compatibility and smaller file sizes. Fast, secure, and unlimited conversions in your browser.
- 100% Free
- No Upload Required
- Unlimited Conversions
- Fast & Private
Drag and drop video file
or browse to choose a file
Why Convert AVI to MP4?
Dramatically Smaller Files
AVI files from the 1990s-2000s lack modern compression. Converting to MP4 with H.264 can reduce file sizes by 50-90% while maintaining the same visual quality.
Modern Device Compatibility
Many modern devices and platforms don't support AVI playback. MP4 works universally on smartphones, tablets, smart TVs, gaming consoles, and all modern computers.
Web & Social Media Ready
Upload your old AVI videos to YouTube, Instagram, Facebook, or TikTok by converting to MP4 first. Social platforms require modern formats for faster processing and better streaming.
Save Storage Space
Free up hard drive space by converting your old AVI video collection to MP4. Store more videos in the same space with modern compression technology.
How to Convert AVI to MP4
- 1Upload Your AVI File
Drag and drop your .avi file into the upload area above, or click to browse. Your legacy video files are processed securely in your browser.
- 2Choose Quality Settings
Select output quality based on your needs. High quality maintains the original video quality, while Medium/Low options create smaller files.
- 3Convert & Download
Click "Convert AVI to MP4" and watch as your old video is transformed into a modern, efficient MP4 file. Download when complete.
AVI vs MP4: Format Comparison
| Feature | AVI (Legacy) | MP4 (Modern) |
|---|---|---|
| Release Year | 1992 (Microsoft) | 1999, widely adopted 2001 |
| File Size | Very large (poor compression) | Small, efficient |
| Device Support | Limited (older devices) | Universal |
| Streaming | Not optimized | Excellent for web |
| Best Use Case | Archival footage from 90s-00s | All modern use cases |
Converting Old Footage?
If you're digitizing old family videos or archiving VHS tapes converted to AVI, consider using "High" quality to preserve as much detail as possible. The file size reduction from AVI to MP4 will still be significant even at high quality.