PDF Diff compares two PDF documents entirely on your device β no uploads, no servers, 100% client-side processing. It offers multiple views (side-by-side, unified, additions/removals/changes-only), exportable HTML/PDF reports, and a CLI you can run with npx pdf-diff for CI-friendly workflows. Itβs delightful because itβs fast, works offline once loaded, and keeps sensitive documents private by design.