pngcheck - tests PNG, JNG or MNG image files for corruption, and prints
size/type info.
pngcheck [
-7cpqtv]
file.{png|jng|mng}
[
file2.{png|jng|mng} [...]]
... |
pngcheck [
-7cpqstvx]
pngcheck [
-7cpqstvx]
file-containing-PNGs...
PNGcheck, version 3.0.3 of 25 April 2021, by Alexander Lehmann, Andreas Dilger
and Greg Roelofs.
Test PNG, JNG or MNG image files for corruption, and print size/type info.
- -7
- print contents of tEXt chunks, escape chars >=128 (for
7-bit terminals)
- -c
- colorize output (for ANSI terminals)
- -p
- print contents of PLTE, tRNS, hIST, sPLT and PPLT (can be
used with -q)
- -q
- test quietly (output only errors)
- -s
- search for PNGs within another file
- -t
- print contents of tEXt chunks (can be used with
-q)
- -v
- test verbosely (print most chunk data)
- -vv
- test very verbosely (decode & print line filters)
- -w
- suppress windowBits test (more-stringent compression
check)
- -x
- search for PNGs within another file and extract them when
found
MNG support is more informational than conformance-oriented.
pngsplit(1),
png-fix-IDAT-windowsize(1)