Convert AVI to MP4 Online
Make your AVI videos compatible with iPhone, Mac, and Windows. Convert to MP4 used by all modern devices and streaming platforms.
Why Convert AVI to MP4?
AVI is an older video container format created by Microsoft in 1992 that is often unsupported on Apple devices like iPhone, iPad, and Mac without installing third-party video player apps. Smart TVs, gaming consoles, and social media platforms also frequently reject AVI files due to their use of legacy codecs.
MP4 with H.264 video and AAC audio is the universal standard for digital video today. Converting AVI to MP4 ensures your video plays everywhere — from web browsers and mobile phones to streaming platforms and smart TVs — while using modern compression that can reduce file sizes by 30 to 50 percent with minimal visible quality loss.
How to Convert AVI to MP4
- Select your AVI file from your device.
- Our server converts it to H.264 MP4 format.
- Download the compatible MP4 video.
Key Features of MiConvert AVI to MP4
- Convert AVI videos to MP4 format online
- Support for common video resolutions
- Fast cloud-based video processing
- No software download required
- Works on desktop and mobile browsers
Frequently Asked Questions
Is MP4 smaller than AVI?
Usually yes. AVI files often use older compression (like DivX/XviD) or no compression. MP4 uses H.264 which is much more efficient, saving 30-50% space.
How to play AVI on iPhone?
You cannot play AVI natively on iPhone. Use this converter to change it to MP4, then you can save it to your Photos or share it.
Does it support large files?
Yes, we handle large AVI movies of any length. Simply upload your file and the entire conversion happens in the cloud on our powerful servers.
Is quality lost?
MP4 with H.264 is highly efficient. While some re-compression does occur during the conversion, the visual difference is usually negligible for standard viewings on screens.