How do I convert AVI to MP4?

Drop the file onto this page and press the button. The conversion runs in your browser, so nothing is uploaded and there is no account or daily limit.

No. It is opened in the page and written back out there. Watch the network panel while it runs and no request carries the video.

Will it lose quality?

Not if the picture is already in a codec the target can hold: it is copied packet for packet. When the codec has to change the video is re-encoded and a little is lost, and the page says which case you are in before you start.

Is there a size limit?

Up to 500 MB. The work happens in your own memory rather than on a server, so the real ceiling is what your browser will hold.

What if I need a different format?

The video converter on this site does MP4, WebM, MKV and MOV in any direction. This page is the same tool with the answer already filled in.

ON YOUR DEVICE · FREE

AVI to MP4

One conversion, done on your own machine

…

What the conversion sites charge

Convertio	~~$6.99 / month~~	upload the whole file, with a daily cap
Zamzar	~~$12 / month~~	upload the whole file, with a size cap
CloudConvert	~~$10 / month~~	upload the whole file, priced per minute
PixPunk	Free	no upload, no account, no daily cap

AVI is old enough that the file you have is probably older than the device you want to watch it on. Every site above needs the whole thing sent to a machine they rent before any work starts. This one opens it where it already sits.

1
Drop the AVI in
Up to 500 MB. It is read by the page and never sent anywhere.
2
Check what it says
If the picture is already in a codec MP4 can hold, it is copied across rather than re-encoded, and the page tells you which one you are getting.
3
Download the MP4
Named after the file you started with, in the same folder rules your browser always uses.

FAQ

How do I convert AVI to MP4?: Drop the file onto this page and press the button. The conversion runs in your browser, so nothing is uploaded and there is no account or daily limit.
Is my file uploaded?: No. It is opened in the page and written back out there. Watch the network panel while it runs and no request carries the video.
Will it lose quality?: Not if the picture is already in a codec the target can hold: it is copied packet for packet. When the codec has to change the video is re-encoded and a little is lost, and the page says which case you are in before you start.
Is there a size limit?: Up to 500 MB. The work happens in your own memory rather than on a server, so the real ceiling is what your browser will hold.
What if I need a different format?: The video converter on this site does MP4, WebM, MKV and MOV in any direction. This page is the same tool with the answer already filled in.

AVI to MP4

What the conversion sites charge

Drop the AVI in

Check what it says

Download the MP4

FAQ

The other tools