PdfCompare

Compares two PDF files pixel by pixel to spot visual differences.

Desktopfreeglobal

PdfCompare is a free, open-source Java tool that compares two PDF files by rendering and comparing them pixel by pixel, catching visual differences that a text-only comparison would miss. It's usable as a library, through a simple interactive UI, or from the command line. It's aimed at developers and QA teams who need to verify that generated PDFs haven't visually regressed after a change.

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