Compare Two PDFs Side by Side

Someone sends you a "minor revision" of a contract you already reviewed. They forgot to track changes. Reading the entire 30-page document again to find what they changed is the kind of work that ages you. Compare both and you'll see exactly what moved.

Drop both PDFs. The tool aligns them page by page and highlights additions in green, deletions in red, and modified text in yellow. You can scroll either side independently or sync them. For a final report, download an HTML or PDF showing the differences in summary form.

Best results come from text-based PDFs that share the same structure. Comparing scanned documents needs OCR first. Comparing wildly different files (different layouts, different page counts) works but the alignment is rougher.