Compare two versions of a PDF document to quickly detect revisions, contract modifications, altered numbers, and formatting edits. Generates a highlighted visual diff report and side-by-side comparison entirely inside your browser.
The tool renders corresponding pages from both PDF files and calculates pixel-level differences, highlighting removed content in red and added content in green.
Yes. The tool generates a multi-page diff report PDF where each page clearly shows the highlighted differences between your documents.
No. Both documents are rendered and compared 100% locally in your browser memory via WebAssembly and HTML5 Canvas.
PDF Toolbox is engineered with a strict browser-first architecture. All file operations execute entirely in your local browser sandbox via modern WebAssembly and JavaScript engines. No file bytes or sensitive document data are ever uploaded, buffered, or stored on external servers or cloud infrastructure. Memory buffers are cleared immediately when you finish or close your tab.