PNG Chunk Inspector
Drop a .png file to walk every chunk in order — signature check, IHDR header, IDAT data, palette and transparency, gamma, color profile, and any embedded text metadata. CRC32 of every chunk is verified. The whole parse runs in your browser; the file is never uploaded.
Chunk type quick reference
IHDR,IDAT,IEND,PLTE— the four critical chunks every PNG must handle.tEXt,zTXt,iTXt— textual metadata (Software, Author, Description, ICC profile name, XMP, etc.).pHYs— pixel density.gAMA,sRGB,iCCP,cHRM— color management.tRNS— transparency for indexed or grayscale images.bKGD— default background color.- An uppercase first letter means the chunk is critical (must be understood). Lowercase = ancillary (safe to skip).