pngcheck

Forensics tool for validating the integrity of PNG based (PNG, JNG, MNG) image files. Can also extract embedded images and text from a file. More information: http://www.libpng.org/pub/png/apps/pngcheck.html.

• Verify the integrity of an image file:

pngcheck path/to/file.png

• Check the file with [v]erbose and [c]olorized output:

pngcheck -vc path/to/file.png

• Display contents of [t]ext chunks and [s]earch for PNGs within a specific file:

pngcheck -ts path/to/file.png

• Search for, and e[x]tract embedded PNGs within a specific file:

pngcheck -x path/to/file.png