Is Compare PDF completely free and ad-free?

Yes! Compare PDF on DocTool is 100% free with zero popups, zero banner ads, and zero hidden fees.

Are my files uploaded or stored on your servers?

No. Compare PDF processes all files 100% locally in your web browser using WebAssembly. Your files never touch external servers.

Yes! DocTool works seamlessly across all modern mobile browsers (Android and iOS) as well as desktop computers.

Compare two PDF documents side-by-side or with visual difference highlights to detect changes and revisions.

⚡ Bulk Batch Active: Up to 2 files at once • Auto-packaged as ZIP

Supports: PDF • Max 25MB per file • 10 daily tokens (Sign up for +5 bonus)

Step-by-Step Tutorial

Follow this quick walkthrough to achieve maximum performance and flawless results.

Upload the original PDF document and the revised version you want to compare side-by-side.

Compare contracts, invoices, legal drafts, or updated design mockups privately.

Switch between Side-by-Side preview, Visual Difference Overlay, and extracted text comparison.

Removed content is highlighted in red, new additions in green, and identical sections in neutral gray.

Generate and download a unified side-by-side comparison PDF for record-keeping and team reviews.

Processing runs entirely in your local browser sandbox with zero cloud exposure.

Reduce PDF file sizes with customizable compression presets while preserving document clarity.

Combine multiple PDF files into a single organized document with drag-and-drop page sorting.

Extract specific page ranges or split each page of a PDF document into individual files.