How is this different from PDF Diff?

Compare PDFs provides a broader comparison view, while PDF Diff focuses on precise text-level differences. Compare PDFs is better for visual layout comparison and quick overview, while PDF Diff is better for detailed text change tracking.

Can I compare a Word document against a PDF?

Both files must be in PDF format. Convert the Word document to PDF first using our Word to PDF tool, then compare the two PDFs.

What types of changes are detected?

The tool detects text additions, deletions, and modifications, as well as visual changes like moved elements, image changes, and formatting differences.

Is this safe for comparing legal contracts?

Yes. Both documents are compared entirely in your browser via WebAssembly. No files are transmitted to any server, making it safe for privileged legal documents and sensitive business contracts.

Compare PDFs

Compare two PDF documents and identify differences between them directly in your browser. Overlay or side-by-side comparison modes highlight text changes, layout shifts, and visual differences between document versions. Essential for contract review, quality assurance, regulatory compliance, and version control workflows. Processing runs locally via WebAssembly, keeping confidential documents private.

Not yet implemented

Powerful Compare PDFs Features

Visual Comparison

Side-by-side and overlay modes highlight every difference between versions.

Change Detection

Text additions, deletions, and modifications automatically identified.

Contract Safe

Both documents compared locally. No files uploaded to any server.

How To Compare PDFs Online for Free

Upload Two PDFs

Drop your original and revised documents into the tool.

Review Differences

Navigate page by page with differences highlighted in both modes.

Export Report

Download a summary of all changes between the two documents.

Everything You Need in a Compare PDFs

Dual View Modes

Side-by-side for layout comparison, overlay for pixel-level differences.

Text Changes

Additions, deletions, and modifications detected at the text level.

Visual Diff

Pixel-level overlay highlights any visual change between versions.

Page Navigation

Jump between pages with differences. Count of changes per page shown.

Change Report

Export a summary listing all detected differences.

Local Processing

WebAssembly compares documents on your device. Content stays private.

Frequently Asked Questions

Document Work Made Easy

Process your PDFs with our collection of free, privacy-first tools. No uploads to servers, no registration required. Everything runs directly in your browser.