FreePDFWorker
Compare two PDF documents and find differences. See changes side-by-side or highlighted in an overlay view. Perfect for reviewing document revisions. All processing happens locally.
Drop first file or click to browse
Drop second file or click to browse
Analyzing documents...
View both documents next to each other for easy comparison.
See exactly what changed with color-coded highlighting.
All comparison happens in your browser. Files never leave your device.
Compare documents with any number of pages.
The tool detects visual differences — any change in text, images, formatting, or layout will be highlighted. It compares the rendered appearance of each page.
Yes! If one PDF has more pages, those extra pages will be shown as fully different (added or removed).
Red shows content only in the original (removed), green shows content only in the modified version (added), and yellow indicates areas that changed.
Yes, since it compares visual appearance, it works with any PDF including scanned documents. However, minor scanning artifacts may show as differences.