PDiff

What PDiff is

PDiff is desktop software for comparing PDFs and identifying changes in layout, formatting, and page breaks. It displays documents side by side, synchronizes extracted text, and highlights differences in both views. Reviewers can navigate changes, accept them, hide less relevant items, and add comments. Filtering tools include exclusion areas, page ranges, text-flow and table controls, replacement rules, comments, and OK checkmarks. PDFs can be compared with DOC, DOCX, RTF, TXT, XLS, and other common files, which are converted through their native applications. Output options include tabular, annotated, and side-by-side PDFs, XML, CSV, PDiff project files, and command-line return codes. PDiff Professional adds GUI batch processing and command-line operation. It supports Unicode text, including Chinese, Japanese, Korean, Arabic, and Hebrew. CSci says processing occurs locally and files are not transferred over the internet, with offline operation available by arrangement. Uses include quality assurance, regulatory compliance, contract and legal review, pharmaceutical packaging, and technical documents. Pricing is available by contacting CSci; business customers can request a full-functionality trial.