pngcheck ☆
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Description:
Print info and check PNG, JNG, and MNG files
Type: Formula  |  Latest Version: 3.0.3@0  |  Tracked Since: Dec 24, 2025
Links: Homepage  |  formulae.brew.sh
Category: Developer tools
Tags: png image-validation cli debugging multimedia
Install: brew install pngcheck
About:
pngcheck is a command-line utility that verifies the integrity of PNG, JNG, and MNG image files by parsing their internal structure. It can detect corrupted chunks, invalid CRC checksums, and malformed data streams. The tool also provides detailed metadata output, making it invaluable for debugging image processing pipelines and ensuring file validity.
Key Features:
  • Validates PNG, JNG, and MNG file integrity and structure
  • Extracts and displays detailed chunk information and metadata
  • Detects CRC errors and structural anomalies
  • Supports verbose output modes for in-depth analysis
Use Cases:
  • Debugging corrupted image uploads on web servers
  • Verifying integrity of image archives before distribution
  • Automated quality assurance in image processing scripts
Alternatives:
  • ImageMagick – More versatile for image manipulation, but pngcheck is specialized for deep structural validation and error detection.
  • file – Provides basic file type identification, whereas pngcheck offers detailed PNG-specific validation and metadata.
Version History
Detected Version Rev Change Commit
Dec 24, 2025 7:03am 3.0.3 0 VERSION_BUMP 16027501
Sep 16, 2025 11:52am 0 VERSION_BUMP 7a8e9952
Sep 14, 2024 7:03am 0 VERSION_BUMP 8c592878
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