image optimizer for web

Corrupts PNGs

Anon said, on 24/05/2022
I converted many PNGs and some of them are now corrupted. Irfanview shows this message:

...png : Decode error ! Invalid or unsupported PNG file.

Web browser, Xnview can still open them, and some websites reject them from uploading.
cédric (dev) said, on 25/05/2022
file (in/out), command-line