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Frequently asked questions
What is PDF Compare?+
Upload two PDFs, click Compare, and see highlighted differences — layout changes, images, and wording updates.
How do I use PDF Compare?+
Side-by-side pages plus a difference highlight overlay. Jump Prev/Next to pages that actually differ (skip identical ones). Text-change list when the PDF has an extractable text layer. 100% client-side — your PDFs never leave this device. Limits: 10 MB and 50 pages per file; password-protected PDFs are not supported
Is PDF Compare free?+
Yes, PDF Compare is completely free. No account or sign-up required, and all processing happens in your browser — nothing is sent to a server.
Is my data safe when I use PDF Compare?+
Yes. PDF Compare runs entirely in your browser using JavaScript and Web APIs — your input is never uploaded, transmitted, or stored on any server.