PNG Chunk Inspector

The PNG Chunk Inspector provides a focused, read-only analysis of PNG files by enumerating chunks, their lengths, types, and CRCs. It helps identify malformed sequences, unknown chunks, and CRC mismatches that signal data corruption or tampering. Conceptually, the tool parses the binary stream, validates CRCs against chunk data, and compares the observed chunk order with the PNG standard. Benefits include faster defect identification for developers, QA teams, and security researchers, and easier integration into CI pipelines via exportable metadata. Core features include chunk listing, per-chunk CRC validation, and an overall health assessment. Optional enhancements such as hex dumps and detailed explanations of common chunks aid deeper investigations and forensic reviews. Typical use cases involve validating image integrity after transfer, diagnosing unexpected chunks from metadata-rich sources, and auditing PNG conformance in image processing workflows. The tool provides a precise, export-ready data model suitable for programmatic consumption in debugging, auditing, and security analysis. Its unique value lies in delivering transparent, byte-level visibility into PNG structure without modifying the input file, enabling reproducible investigations across development and security teams.