Convert MP4 to AVI
Last updated: June 1, 2026To convert MP4 to AVI, drop your MP4 file into the converter above, then download the AVI result. It's free, needs no sign-up, and there's no watermark. Conversion runs in your browser with on-device FFmpeg, so your files never leave your device.
Why convert MP4 to AVI?
Convert MP4 to AVI for older software, editors or hardware that still expects the classic AVI container. The video is re-encoded for compatibility so it plays where a modern MP4 won't.
- Feeding video into legacy editing software that wants AVI.
- Playing a clip on older media players or devices.
- Meeting a workflow that specifically requires AVI.
MP4 vs AVI
MP4 · MPEG-4 Part 14 (H.264)
MP4 with H.264 video is the most universally compatible video format — it plays everywhere and uploads cleanly to YouTube, Instagram, TikTok and messaging apps.
AVI · Audio Video Interleave
AVI is an older Microsoft container. It's widely readable on desktops but produces large files and lacks modern features like streaming-friendly fast-start, so it's usually converted to MP4.
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Video Converter
Convert video to MP4, WebM, MOV, MKV, GIF or MP3.
Open Video ConverterMP4 to AVI — frequently asked questions
How do I convert MP4 to AVI?
Drop your MP4 file (or several) into the converter, confirm AVI is selected as the output, click convert, then download the AVI file. The whole thing takes a few seconds.
Is this MP4 to AVI converter free?
Yes — it's completely free with no watermark and no sign-up required.
Is it safe to convert MP4 to AVI here?
Yes. Conversion runs on-device with FFmpeg compiled to WebAssembly, so your MP4 file is never uploaded to a server.
Can I convert multiple MP4 files at once?
Convert one MP4 file at a time — finish one, then drop in the next.
Does it work on mobile?
Yes — the converter runs in any modern browser on phones, tablets and desktops.