Why turn a JPG into a AVIF
AVIF holds a photograph at roughly half the size of a JPG that looks the same. On a gallery or a shop that is the single largest change available to page speed, and it needs no change to the picture itself.
Convert JPG to AVIF
Halve a photograph again, for a page that must be fast.
This file stays on your device
Drop files here
Up to 30.0 MB
Lower makes a smaller file.
What the change costs
Encoding takes real time, and the picture loses a little more on the way through. Serve AVIF with a JPG or WebP fallback if any of your visitors use old browsers.
When to do something else
This is a format for serving, not for sending. If somebody has to open the file in a program, give them the JPG.