Convert AVI to MP4
Turn old AVIs into MP4 that plays on phones, TVs and the web. All in your browser.
Your files never leave your device
How to convert AVI to MP4
- 1
Upload the AVI
Old videos, cameras, captures…
- 2
Convert
Re-encoded to H.264 + AAC.
- 3
Download the MP4
Ready for any device.
Why use this tool
Rescue old videos
20-year-old AVIs play everywhere again.
Modern codecs
DivX/XviD/MJPEG become standard H.264.
Smaller files
H.264 compresses far better than AVI-era codecs.
Private
The video never leaves your device: ffmpeg runs in your browser.
Frequently asked questions
Which AVI codecs are supported?
The usual suspects: DivX, XviD, MJPEG, MS-MPEG4… If some rarity fails, the error will say so clearly.
Will the MP4 be smaller?
Usually much smaller: H.264 is far more efficient than classic AVI codecs.
Is quality lost?
The CRF 23 re-encode is visually faithful; coming from old codecs it can even look better on modern screens.
Is there a size limit?
250 MB per file; from 100 MB we warn it may be slow.