pngcheck(1) on Linux
The text 3db631ac60a2, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye) shipped it. The page shows this text now.
tests PNG, JNG or MNG image files for corruption, and prints size/type info.
Flags it lists
-
-7 -
-c -
-p -
-q -
-s -
-t -
-v -
-vv -
-w -
-x