AVI to MP4 Converter

Convert AVI video files to the universally supported MP4 format. Powered by FFmpeg.wasm for high-speed, private processing in your browser.

Drop AVI files here or click to upload

Videos are processed locally (Private)

ALL CONVERTERS

About AVI to MP4 Conversion

AVI (Audio Video Interleave) is a legacy container format that can be quite bulky and incompatible with many modern mobile devices and web browsers. MP4 (MPEG-4 Part 14) is the modern standard, offering better compression and universal compatibility.

Our converter uses WebAssembly (WASM) to run a full version of FFmpeg directly in your browser. This means your video data stays on your machine, providing a layer of security that traditional cloud converters cannot match.

How to Convert AVI to MP4

  1. Upload: Click the upload zone or drag your AVI files onto the tool.
  2. Load FFmpeg: On your first conversion, the tool will download the core processing engine (~30MB).
  3. Process: Click "CONVERT TO MP4". You can monitor the progress on the screen.
  4. Download: Once the conversion is finished, your browser will automatically save the new MP4 file.

Frequently Asked Questions

Is this tool free?

Yes, our AVI to MP4 converter is completely free to use with no hidden costs.

Why is the first conversion slow?

The tool needs to load the FFmpeg processing engine (WebAssembly) into your browser's memory. This only happens once per session.

Are my videos uploaded to a server?

No. All processing is done locally on your computer. Your video data is never sent to our servers.

Does this support 4K videos?

Yes, but high-resolution video conversion requires significant CPU power and RAM from your computer.