Convert MP4 to AVI

Transform your universal video format for web and devices into AVI format. Free, private, and browser-based.

How it works

  1. Upload MP4 Files — Drag and drop your MP4 files into the converter, or click to browse. Common sources: smartphones, screen recordings.
  2. Convert to AVI — The converter processes your files to AVI format entirely in your browser. No files are uploaded to any server — your privacy is guaranteed.
  3. Download Results — Download your converted AVI files instantly. For multiple files, download individually or as a ZIP archive.

Why convert MP4 to AVI

  • Convert to lossless AVI format to prevent further quality degradation during editing
  • Leverage AVI advantages: wide software compatibility
  • Overcome MP4 limitations: lossy compression — some quality loss
  • Upload to websites and platforms that require or prefer AVI format

FAQ

Is MP4 to AVI conversion free?
Yes, Fileza.io converts MP4 to AVI completely free with no limits on file size or number of conversions. No hidden fees, no watermarks, and no account required.

Will I lose quality converting MP4 to AVI?
Both MP4 and AVI use lossy compression. Output quality is excellent at high quality settings (85%+) — most people cannot see any difference.

Is it safe to convert MP4 to AVI online?
Absolutely. Unlike most online converters, Fileza.io processes your files entirely in your browser using WebAssembly. Your MP4 files are never uploaded to any server — the conversion runs on your own device, keeping your files 100% private.

Can I convert multiple MP4 files to AVI at once?
Yes, Fileza.io supports batch conversion. Drag and drop multiple MP4 files at once and they will all be converted to AVI simultaneously. Download them individually or as a ZIP archive.

Does MP4 to AVI conversion work on mobile?
Yes, the converter works on any device with a modern web browser — iPhones, iPads, Android phones, and tablets. No app installation required.

Will the converted AVI files be smaller or larger than MP4?
AVI files will be larger than the original MP4. This is because AVI uses lossy/lossless compression which prioritizes quality over file size.

How long does MP4 to AVI conversion take?
Most conversions complete in seconds. The exact time depends on file size and your device performance. Since processing happens locally in your browser, faster devices convert more quickly. Video files may take longer due to re-encoding.