Included in Debian stable: http://packages.debian.org/pngcheck
Jari sdesc: "PNG file format checker" ldesc: "verify the integrity of PNG, JNG and MNG files (by checking the internal 32-bit CRCs or checksums) and optionally dumps almost all of the chunk-level information in the image in human-readable form. For example, it can be used to print the basic stats about an image (dimensions, bit depth, etc.); to list the color and transparency info in its palette; or to extract the embedded text annotations. All PNG and JNG chunks are supported, plus almost all MNG chunks (everything but PAST, DISC, tERm, DROP, DBYK, and ORDR). This is a command-line program with batch capabilities." category: Graphics requires: cygwin zlib a) manual wget \ http://cygwin.cante.net/pngcheck/pngcheck-2.3.0-1-src.tar.bz2 \ http://cygwin.cante.net/pngcheck/pngcheck-2.3.0-1.tar.bz2 \ http://cygwin.cante.net/pngcheck/setup.hint b) automatic gpg --keyserver wwwkeys.pgp.net --recv-keys 955A92D8 mkdir pngcheck ; cd pngcheck rm -f get.sh get.sh.sig wget http://cygwin.cante.net/pngcheck/get.sh \ http://cygwin.cante.net/pngcheck/get.sh.sig && gpg --verify get.sh.sig get.sh && sh get.sh -- Welcome to FOSS revolution: we fix and modify until it shines