diff-pdf
Compare two PDFs. tldr-pages
On several platforms
Several platforms
Compare PDFs, indicating changes using return codes (0 = no difference, 1 = PDFs differ)
diff-pdf path/to/a.pdf path/to/b.pdfIdentifyCompare PDFs, outputting a PDF with visually highlighted differences
diff-pdf --output-diff=path/to/diff.pdf path/to/a.pdf path/to/b.pdfIdentifyCompare PDFs, viewing differences in a simple GUI
diff-pdf --view path/to/a.pdf path/to/b.pdfIdentify