Convert MP4 to AVI Online
MP4 files are the universal video container, playable on virtually every device, browser, phone and smart TV. Converting to AVI gives you legacy playback, older Windows software, hardware players.
How to convert MP4 to AVI
- Upload your MP4 file. Drag it onto the box above or click to browse. Files up to 200 MB are accepted.
- Choose AVI as the output. The target format is pre-selected on this page — just press “Convert now”.
- Download the result. Conversion runs on our own server and the download starts as soon as it is ready. Your files are deleted automatically.
Why convert MP4 to AVI?
People convert MP4 to AVI mainly for compatibility. Near-universal support. Typically pairs H.264/H.265 video with AAC audio. AVI, by contrast, is built for legacy playback, older Windows software, hardware players, and broad legacy support, but inefficient compression and no modern codec features.
MP4 vs AVI: key differences
| MP4 | AVI | |
|---|---|---|
| File type | lossy container | legacy container |
| Typical use | streaming, social media, mobile playback, archiving everyday video | legacy playback, older Windows software, hardware players |
| Compatibility | Near-universal support. Typically pairs H.264/H.265 video with AAC audio. | Broad legacy support, but inefficient compression and no modern codec features. |
Tips for a clean MP4 to AVI conversion
- Near-universal support. Typically pairs H.264/H.265 video with AAC audio.
- Use the highest-quality source MP4 you have — converting a compressed file again cannot restore lost detail.
- If you only need a smaller file, try a lower resolution or bitrate instead of a different format.
- Keep the original MP4 until you have checked the converted AVI opens the way you expect.
Frequently asked questions
How do I convert MP4 to AVI?
Upload your MP4 file to the converter on this page, make sure AVI is selected as the output format and click “Convert now”. When the conversion finishes the download starts automatically.
Is this MP4 to AVI converter free?
Yes — it is completely free and needs no account. Files up to 200 MB are accepted, and heavy use is rate-limited so the service stays available for everyone.
Will converting MP4 to AVI reduce quality?
AVI uses its own compression, so the converted file is re-encoded. Quality loss is minimal at sensible settings, but keep the original MP4 if you may need to convert again later.
What is a MP4 file?
MP4 is the universal video container, playable on virtually every device, browser, phone and smart TV. Its technical name is MPEG-4 Part 14 and it is typically used for streaming, social media, mobile playback, archiving everyday video.
What is a AVI file?
AVI is a classic Microsoft container from 1992 that still plays on many older players and DVD hardware. Its technical name is Audio Video Interleave and it is typically used for legacy playback, older Windows software, hardware players.
Can I convert MP4 to AVI on my phone?
Yes. The converter runs in the browser on Android, iOS, Windows, macOS and Linux — no app installation is required.
Are my files kept on the server?
No. Uploaded files and converted results are deleted automatically a short time after the conversion finishes.