Convert AVI to MP4 Online
Free, easy-to-use AVI to MP4 converter. Transform your older AVI videos to the universally compatible MP4 format.
AVI to MP4 Converter
Convert your AVI files to MP4 format quickly and easily. Upload your file and download the result.
Max file size: 50MB
Why Convert AVI to MP4?
AVI (Audio Video Interleave) is an older video format that, while reliable, isn't as widely supported on modern devices and platforms as MP4. Converting to MP4 ensures your videos can be played on virtually any device or media player while often reducing file size.
Benefits of Converting AVI to MP4
- Universal compatibility - MP4 works on virtually all modern devices and platforms.
- Smaller file size - MP4 typically offers better compression than AVI.
- Mobile device support - Better playback on smartphones and tablets.
- Streaming friendly - MP4 is optimized for online streaming services.
- Modern codec support - Access to more efficient video and audio codecs.
How to Convert AVI to MP4 Using Our Tool
- Upload your AVI video file using the upload button or drag and drop functionality.
- Our converter will automatically select MP4 as the output format.
- Optionally, set start/end times if you want to trim the video.
- Solve the simple captcha to verify you're human.
- Click "Convert AVI to MP4" to start the conversion.
- Once conversion is complete, download your new MP4 file.
About AVI and MP4 Format Differences
| Feature | AVI | MP4 |
|---|---|---|
| Developed by | Microsoft (1992) | MPEG (standardized) |
| Container Type | Older, more limited container | Modern, flexible container |
| Compression Efficiency | Less efficient | More efficient (H.264/H.265) |
| File Size | Generally larger | Typically smaller |
| Modern Device Support | Limited | Extensive |
| Best For | Legacy content, simple editing | Modern playback, streaming, sharing |
Our AVI to MP4 converter is designed to maintain the highest possible video quality during conversion. We use modern encoding techniques to preserve the visual and audio fidelity of your original AVI files, while providing the benefits of the more widely supported MP4 format.
AVI files are sometimes associated with older video cameras, legacy software, or older video collections. Converting these files to MP4 not only makes them more accessible on modern devices but also helps future-proof your video library. MP4's better compression means you'll save storage space without sacrificing noticeable quality.
Other Video Conversion Options
Frequently Asked Questions
Will I lose quality when converting AVI to MP4?
Our converter is designed to maintain high quality during conversion. While technically any conversion involves re-encoding that could affect quality, we use optimal settings to minimize quality loss. In most cases, the difference is negligible or imperceptible, especially when using our high-quality conversion settings.
Why won't my AVI files play on my smartphone or tablet?
Most modern mobile devices don't include native support for the AVI format. iOS devices like iPhones and iPads have particularly limited AVI support. Android devices might play some AVI files but often with compatibility issues. Converting to MP4 solves these problems since MP4 is universally supported on virtually all smartphones and tablets.
How much smaller will my video be after converting from AVI to MP4?
The file size reduction varies depending on the content of your video and the codecs used in the original AVI file. However, most users see a significant reduction in file size—typically between 30% and 70% smaller—without noticeable quality loss. Videos with a lot of motion or detail might see less reduction, while simpler videos might compress even more efficiently.