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AVI to MP4 Converter

Convert AVI video files to MP4 format efficiently.

Upload AVI Video

Drag and drop or click to browse

Modernize Your Videos

AVI files are often large and unplayable on phones or web players. Convert them to MP4 (H.264), the universal standard for video compatibility and compression.

Universal Playback

Why Use This Converter?

Plays Everywhere

MP4 works on iPhone, Android, Mac, Windows, and Smart TVs.

Efficient Size

Reduce file size significantly without losing visible quality.

Browser Powered

Using WebAssembly technology, we process video safely on your device.

Unlimited Duration

Since we don't upload to a server, we don't enforce duration limits.

How this AVI to MP4 Converter works

The AVI to MP4 Converter runs entirely in your browser using JavaScript. Unlike other tools that send your data to a server, we process everything locally on your device. This guarantees 100% privacy and blazing fast speed.

  • No server interaction – data never leaves your device
  • Instant results since there is no network latency
  • Works offline once the page is loaded
  • Free to use with no usage limits

How to Use

1

Upload AVI

Select your AVI video file (works best on desktop).

2

Converting

FFmpeg processes your video inside your browser.

3

Download

Save your new ready-to-play MP4 file.

Example Usage

Modernizing a legacy video format:

Input
vacation_video.avi (150MB)
Output
vacation_video.mp4 (45MB, H.264)

Frequently Asked Questions

How can I convert AVI to MP4 for free?
CodeItBro's AVI to MP4 converter is completely free. Simply upload your video and our browser-based FFmpeg engine will convert it to a universally compatible MP4 format.
Is MP4 better than AVI?
Generally, yes. MP4 (H.264) offers much better compression than standard AVI, meaning smaller file sizes with similar quality. MP4 is also supported by almost all mobile devices, tablets, and web browsers, whereas AVI often requires specific players.
How long does the conversion take?
Conversion speed depends on your computer's processing power and the file size, as the tool runs locally in your browser. For short clips, it's almost instant. Large movies may take a few minutes.
Is there a file size limit?
Because we process files locally, there is no strict server-imposed limit (like the 100MB limit on many other sites). You can convert larger files as long as your device has enough memory to handle the operation.
Does this tool work on mobile?
Yes, modern mobile browsers that support WebAssembly can run this tool. However, for best performance with large video files, a desktop or laptop is recommended.
Is my video uploaded to the cloud?
No. We utilize FFmpeg.wasm technology to process your video locally. Your personal videos stay private on your device and are never uploaded to our servers.

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The AVI to MP4 Converter is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.

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