WebDiff

WebDiff is a desktop application for macOS and Windows that lets users compare a web page before and after an update. By entering the URLs of the pages to examine—or importing them from a sitemap—the tool analyzes the pages and generates a report that highlights visual, SEO, link, source‑code, and network‑request differences. It works with publicly hosted sites as well as locally hosted pages reachable via VPN, local networks, or HTTP authentication.

The report presents changes with colored traffic‑light indicators for quick scanning, and detailed pages allow deeper inspection of each discrepancy. Users can re‑run analyses any number of times and export the results as PDFs for sharing or documentation.

WebDiff targets developers, designers, and site owners who need to verify that updates have not introduced unintended alterations. Its distinguishing traits are the breadth of comparison categories, the ability to handle multiple environments, and a one‑time purchase model without subscription limits.