MP4
MP4 video
MP4 is the video container everything plays. It normally holds H.264 video and AAC audio, a pairing that phones, browsers, TVs and social networks all accept.
Opens in Every phone, browser, TV, console and editor
MP4 converterMP4 to AVI converter, without the upload.
Turn MP4 videos into AVI. It is converted in your browser, so the file never leaves your device.
Drop MP4 files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Convert to
- On your device · nothing is uploaded
- No account, no email
- Batch and ZIP download
- Free
How to convert MP4 to AVI
Add your MP4 videos
Drop MP4 files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
AVI is already chosen
Press Convert. Open Options first if you want to change the defaults. The work happens in this tab and can take a while for large files.
Download
Save the AVI, or download everything as one ZIP if you converted several files.
Why ToAny
Private by construction
The MP4 to AVI converter is part of this page and runs inside your browser. Your videos are never sent to ToAny or to anyone else.
No upload, no queue
Nothing has to travel to a server and back, so work starts the moment you press Convert. How long it takes depends on your device and the size of the file.
Free, without an account
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
MP4 to AVI: what to expect
MP4 is a delivery format: other tools sometimes need audio only, a GIF, or a different container. AVI is read by old Windows software and some standalone players. MP4 is at home in sharing and uploading video anywhere; AVI is the usual choice for old Windows software and capture devices.
The defaults suit most files. Under Options you can lower the resolution, trade quality against file size, remove the sound and trim the start and end. This is demanding work for a browser: a long or high-resolution file can take several minutes, and your device does all of it, so keep the tab open.
This pair uses the compatibility engine, ffmpeg built for the browser, because AVI cannot be written by the browser's built-in codecs. It is a one-off download of about 10 MB that the browser keeps, it is slower than the built-in codecs, and it takes files up to 1 GB.
MP4 vs AVI
AVI
AVI video
AVI is Microsoft's 1992 video container. It predates modern codecs and streaming, so files tend to be large and phones and browsers will not play them.
Opens in Windows Media Player and VLC; not phones or browsers
AVI converter| MP4MP4 video | AVIAVI video | |
|---|---|---|
| Stands for | MPEG-4 Part 14 | Audio Video Interleave |
| Type | Video container | Video container |
| Compression | Lossy | Depends on what is inside |
| Usually contains | H.264 or H.265 video with AAC audio | Often DivX, Xvid or MJPEG video with MP3 audio |
| Introduced | 2001, by the Moving Picture Experts Group | 1992, by Microsoft |
| Opens in | Every phone, browser, TV, console and editor | Windows Media Player and VLC; not phones or browsers |
| Best for | Sharing and uploading video anywhere | Old Windows software and capture devices |
| File extension | .mp4 | .avi |
Questions
Are my videos uploaded anywhere?
No. The MP4 to AVI conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
Does converting MP4 to AVI reduce quality?
Yes, a little. AVI files are always re-encoded here (MPEG-4 video with MP3 audio, which is what AVI players expect), and re-encoding costs some quality. Under Options you can favour quality or a smaller file.
Can I convert several MP4 files at once?
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
How do I convert MP4 to AVI on Windows, Mac, iPhone or Android?
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the MP4 file, press Convert and save the AVI. There is nothing to install.
Is there a file size limit?
Yes. MP4 to AVI runs on the compatibility engine, which takes files up to 1 GB, and a long clip takes a while because it is slower than the browser's built-in codecs. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.