pngcheck
Verify PNG file integrity and structure
TLDR
Check PNG file
$ pngcheck [image.png]
Verbose output$ pngcheck -v [image.png]
Check multiple files$ pngcheck [*.png]
Show color info$ pngcheck -c [image.png]
Extract text chunks$ pngcheck -t [image.png]
SYNOPSIS
pngcheck [options] file...
DESCRIPTION
pngcheck verifies the integrity and structure of PNG, JNG, and MNG image files. It validates CRC checksums, checks chunk ordering, and reports any structural errors or corruption in the file format.
In verbose mode, it displays detailed information about each chunk including dimensions, color type, bit depth, and compression method. The -t option extracts embedded text metadata from PNG text chunks.
PARAMETERS
FILE
PNG file(s) to check.-v
Verbose output.-c
Color information.-t
Extract text.-7
Check for 7-bit clean.--help
Display help.
CAVEATS
PNG/JNG/MNG formats. Read-only analysis.
HISTORY
pngcheck was created for PNG file validation and inspection.
