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Convert.avi

Convert AVI to MP4 online

100% localFiles never leave your device — no upload, no account, no tracking.
About AVI to MP4

Convert older AVI videos into MP4, the format that plays on virtually every phone, browser, and player. We re-encode to H.264 with ffmpeg.wasm at a quality you control.

The transcode runs entirely in your browser. Your AVI file never leaves your device, so the conversion is completely private.

How it works
  1. 01

    Add an AVI

    Drop your AVI file onto the page or pick it from your device.

  2. 02

    Set quality

    Choose a CRF value for the output quality.

  3. 03

    Convert

    Click Convert to encode an MP4 locally with ffmpeg.wasm.

  4. 04

    Download

    Save the MP4 file.

Features
H.264 outputbroad compatibilityadjustable quality
Frequently asked
How does the AVI to MP4 converter work?
Convert older AVI videos into MP4, the format that plays on virtually every phone, browser, and player. We re-encode to H.264 with ffmpeg.wasm at a quality you control.
Are my files uploaded to a server?
No. Everything runs entirely in your browser using local JavaScript and WebAssembly. Your files never leave your device.
Does it cost anything or require an account?
No. The converter is free, needs no sign-up, and runs locally in your browser.
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