Convert MP4 to AVI
Select Files
Audio, Video and Image supported. Drag or click
From MP4 to AVI in three clicks: upload, configure, download. The entire conversion happens on your device, not on our servers — no uploads, no tracking.
How It Works
Add MP4 Files
Use the upload button or simply drop your MP4 files into the page. No size limits during the upload step.
Start the Conversion
Click convert and WeLoveConvert turns each MP4 file into AVI right in your browser tab.
Grab Your AVI Files
When processing finishes, every output file is ready for download — single file or zipped batch.
About These Formats
Although AVI was largely retired in favor of MP4, there are still real workflows that demand it: older versions of Windows Movie Maker, Sony Vegas pipelines tied to specific codec packs, industrial DVD authoring tools, security DVRs, classroom projectors with USB ports, and hardware media players from the late 2000s often only recognize AVI containers. Converting MP4 to AVI typically increases file size — sometimes 2x to 4x — because AVI is most commonly paired with older codecs like Xvid or MPEG-4 Part 2 that compress less efficiently than the H.264 inside your MP4. The trade-off is wide compatibility with legacy systems that simply refuse to read MP4. AVI also has structural limits worth knowing: no built-in subtitles, weak metadata, and poor support for variable frame rate, so cell-phone footage shot at VFR may need a fixed frame rate before export. WeLoveConvert performs the entire convert MP4 to AVI step locally in your browser through WebAssembly FFmpeg. For best compatibility with old hardware, pair the AVI container with MPEG-4 Part 2 video and MP3 audio at 128 kbps.
Frequently Asked Questions
How do I convert MP4 to AVI?expand_more
Upload your files, confirm the conversion settings, and download your converted files. All processing happens in your browser — no server upload required.
Is this MP4 to AVI converter free?expand_more
Yes, completely free with no hidden fees. No sign-up required, no usage limits. All conversion happens in your browser.
Is it safe to convert MP4 to AVI online?expand_more
Your files never leave your device. All conversion happens locally in your browser using WebAssembly technology. We have zero access to your files.
Will I lose quality converting MP4 to AVI?expand_more
Quality depends on the target format and your settings. Lossless formats like PNG preserve original quality. For lossy formats like JPG, you can adjust the quality slider.
Can I convert multiple MP4 files at once?expand_more
Yes, you can convert multiple files at once. Simply drag all your files into the upload area or click to select them.
Common Issues
- infoFile size grows 2x to 4x because AVI pairs with less efficient codecs like Xvid or MPEG-4 Part 2.
- infoAVI lacks proper subtitle support — any embedded captions in the MP4 source are stripped during conversion.
- infoVariable frame rate from phone recordings causes audio sync drift in AVI — force a constant frame rate first.
- infoH.264 inside AVI has compatibility quirks and is best avoided — use MPEG-4 Part 2 or Xvid for legacy playback.