Compare Two PDFs for Differences

Yes, completely free. Our Compare PDF tool has no hidden costs, no watermarks, and no registration requirement. You can process as many files as you need, each up to 100MB, at no charge. We believe professional PDF tools should be accessible to everyone — students, freelancers, and businesses alike.

Your files are fully protected. All uploads and downloads use 256-bit SSL/TLS encryption during transfer. Processing happens on our isolated Hetzner server infrastructure in Germany — your file is never shared, analysed for commercial purposes, or stored longer than necessary. Every uploaded and processed file is automatically and permanently deleted within one hour of processing.

Supported file types: This tool accepts PDF files up to 100MB each. For files larger than 100MB, use our Compress PDF tool first.

Yes — works on any device. The interface is fully responsive and tested on desktop, tablet, and mobile. Touch-friendly upload areas, drag-and-drop support on desktop, and mobile-optimised buttons mean you get the same experience whether you are on a MacBook, an iPad, or an Android phone. No app download is ever required — open your browser and go.

The comparison detects text additions, text deletions, text replacements, font and formatting changes, image insertions and removals, and layout position shifts. Changes are highlighted with colour-coded annotations — typically green for additions, red for deletions, and yellow for modifications — so you can scan the marked-up output quickly. The tool compares page by page in sequence; it does not handle documents where entire pages have been reordered between versions.