---
name: "pngcheck"
section: "1"
platform: "linux"
package: "pngcheck"
version: "3.0.3-3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/pngcheck"
---

# pngcheck(1)

tests PNG, JNG or MNG image files for corruption, and prints size/type info.

## NAME

pngcheck - tests PNG, JNG or MNG image files for corruption, and prints size/type info.

## SYNOPSIS

**pngcheck** \[*-7cpqtv*\] *file.{png\|jng\|mng}* \[*file2.{png\|jng\|mng}* \[...\]\]\
 ... \| **pngcheck** \[*-7cpqstvx*\]\
 **pngcheck** \[*-7cpqstvx*\] *file-containing-PNGs*...

## DESCRIPTION

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.

## OPTIONS

- **-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

## NOTE

MNG support is more informational than conformance-oriented.

## SEE ALSO

[**pngsplit**(1)](/pngsplit/1.md), [**png-fix-IDAT-windowsize**(1)](/png-fix-IDAT-windowsize/1.md)