Convert AVI to MP4
Convert your AVI video files to MP4 directly in your browser.
How to convert video in 3 steps
Choose a AVI video file.
Click convert to MP4.
Download your MP4 video.
Format descriptions
AVI — AVI is one of the oldest video containers, developed by Microsoft. It is widely compatible but offers less efficient compression and larger files.
MP4 — MP4 is the most widespread and compatible video container. It supports H.264/HEVC and AAC codecs, making it ideal for streaming, the web and mobile devices.
Technical comparison: AVI vs MP4
Technical breakdown of the AVI and MP4 specifications: compression, colour, transparency and animation support.
| Property | AVI | MP4 |
|---|---|---|
| Specification | AVI (Audio Video Interleave) | MP4 (MPEG-4 Part 14) |
| Media type | Video | Video |
| Compression | Lossy · DivX / XviD / MPEG-4 + PCM | Lossy · H.264 / HEVC + AAC |
| Color space / bit depth | 24-bit YUV | YUV 4:2:0, 8-10 bit |
| Transparency | Not applicable | Not supported |
| Animation | Yes (animated) | Yes (animated) |
| Best for | AVI is one of the oldest video containers, developed by Microsoft. It is widely compatible but offers less efficient compression and larger files. | MP4 is the most widespread and compatible video container. It supports H.264/HEVC and AAC codecs, making it ideal for streaming, the web and mobile devices. |
What happens when converting AVI to MP4?
The AVI data is decoded inside your browser with WebAssembly and re-encoded to the MP4 specification, so no file is ever uploaded to a server. MP4 uses lossy compression: the file gets far lighter, but a small amount of fine detail is discarded in the process.
Frequently Asked Questions
What is video conversion?
Video conversion changes a video file from one format to another, for example from AVI to MP4, while keeping the video content.
Are my video files uploaded?
No. This tool processes video files directly in your browser. Your video files are never sent to a server.
Which video formats are supported?
This tool converts AVI video files to MP4, all in your browser.
Is it really free and unlimited?
Yes, the tool is completely free and you can convert as many video files as you want, with no limits.
Does it work on mobile too?
Yes, it works on any modern device, including smartphones, tablets and desktop computers.
Which format will the result be in?
The converted file will always be in MP4 format, ready to download and use.
About the video converter
Convert AVI to MP4 video online for free. Everything happens in your browser: your files are never uploaded to a server, and you need no downloads or sign-up to get started.
See also:
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- Convert AVI to WEBMConvert AVI to WEBM video online for free. Everything happens in your browser: your files are never uploaded to a server, and you need no downloads or sign-up to get started.
- Convert AVI to MKVConvert AVI to MKV video online for free. Everything happens in your browser: your files are never uploaded to a server, and you need no downloads or sign-up to get started.
- Convert MP4 to AVIConvert MP4 to AVI video online for free. Everything happens in your browser: your files are never uploaded to a server, and you need no downloads or sign-up to get started.