Convert AVI to MP4
The fastest way to convert Audio Video Interleave to MPEG-4 Part 14 online. Free, secure, and works on any device.
1How to convert AVI to MP4
Drag & drop your AVI file into the box above.
Click "Convert" to transform it to MP4 instantly.
Save your new file to your device.
2Why use Flux Converter?
Zero Data Usage
Files are converted in your browser. No uploading means no data usage and total privacy.
Lightning Fast
Powered by WebAssembly, conversions happen instantly on your device.
No Limits
Convert as many files as you want, of any size.
Universal
Works on Windows, Mac, Linux, Android, and iOS.
3Why convert AVI to MP4?
Understanding the strengths and limitations of each format helps you decide when converting from AVI to MP4 makes sense. AVI was introduced by Microsoft in 1992 as part of Video for Windows. While largely superseded by MP4 and MKV, it remains widely compatible. MP4 was standardized as ISO/IEC 14496-14 in 2003. Based on Apple's QuickTime format, it became the universal standard for digital video distribution.
AVI
MP4Target
4Technical Details
| Feature | AVI | MP4 |
|---|---|---|
| Full Name | Audio Video Interleave | MPEG-4 Part 14 |
| MIME Type | video/x-msvideo | video/mp4 |
| Category | Video | Video |
| Use Cases | Legacy video playback, Windows-based video workflows, Uncompressed video capture, Video editing with DV codecs | Video streaming and sharing, Social media video uploads, Video editing and production, Online course content |
| Description | AVI is a multimedia container format introduced by Microsoft. It can contain both audio and video data in a file container that allows synchronous audio-with-video playback. | MP4 is a digital multimedia container format most commonly used to store video and audio, but can also store other data such as subtitles and still images. |
5Frequently Asked Questions
What is the difference between AVI and MP4?
AVI (Audio Video Interleave) and MP4 (MPEG-4 Part 14) serve different purposes. AVI is a multimedia container format introduced by Microsoft. It can contain both audio and video data in a file container that allows synchronous audio-with-video playback. On the other hand, MP4 is a digital multimedia container format most commonly used to store video and audio, but can also store other data such as subtitles and still images. Converting between them lets you leverage the strengths of each format depending on your needs.
Does converting AVI to MP4 lose quality?
This depends on the formats involved. If the target format (MP4) uses lossy compression, some data may be discarded during conversion. However, if MP4 is lossless, your file will be preserved at full quality. Our converter uses the best available algorithms to minimize any quality difference.
Is it safe to convert files here?
ABSOLUTELY. Unlike other sites, we do NOT upload your files to a server. All processing happens locally on your device using advanced browser technologies. Your files never leave your computer.
Is this service really free?
Yes, 100% free. No hidden fees, no watermarks, and no registration required. We support ourselves through non-intrusive advertising.
When should I use AVI instead of MP4?
AVI is best for: Legacy video playback and Windows-based video workflows. MP4 is better for: Video streaming and sharing and Social media video uploads. Choose whichever format best fits your workflow and compatibility requirements.
Can I convert AVI on mobile?
Yes! Our converter works on iPhones, iPads, and Android devices. All processing happens in your browser — no app download needed.
Privacy Guarantee
Your files are yours. We do not store, view, or claim ownership of any content you convert. Processing is done entirely in your browser.