Jul 23, 2025 · DiffPDF is a straightforward yet powerful free utility for Windows that enables users to efficiently identify changes and differences between PDF files.

DiffPDF is useful for anyone who needs to compare PDFs, reports, books, or labels—for example, archivists, engineers, journalists, linguists, packagers, publishers, researchers, software testers, and …

Added --grayscale option to convert the diff output to grayscale and only use color for pixels with differences. This is useful for comparing documents that use colors and that may look confusing in …

Easily review differences between two similar files with the PDF compare tool. Visualise highlighted document changes side by side.

Compare files (doc, docx, pdf, pptx, etc.) to find differences online. Use our desktop app for private, offline diffs.

By default the comparison is of the text on each pair of pages, but comparing the appearance of pages is also supported (for example, if a diagram is changed or if a paragraph is reformatted). It is also …

Luckily, tools capable of comparing two PDF documents automatically exist to make life easier, and DiffPDF is such a solution. Upon inputting their documents and choosing the preferred comparison...

Apr 9, 2026 · Built with PyMuPDF for PDF parsing and pixelmatch-fast (Python port of pixelmatch) for visual comparison.

Sep 24, 2009 · DiffPDF is the most advanced tool presented here, in my opinion. Not only does it offer a nice graphical comparison, but it tracks changes more cleverly than others, e.g. the xdocdiff for …

Mar 9, 2017 · DiffPDF is available for users with the operating system Windows XP and previous versions, and you can download it in English.