Compare PDF Files

A free online tool to visually compare two PDF documents. Upload your files and easily spot differences side-by-side.

Original PDF (File 1)

Drag & drop PDF 1 here

or click to browse files

Revised PDF (File 2)

Drag & drop PDF 2 here

or click to browse files

Privacy Note: All PDF processing and comparison happens in your browser. We do not upload your files to our servers.

How to Compare PDF Files

Follow these simple steps below

Step 1 – Upload both PDFs

Choose your original and revised files. The tool supports standard PDFs up to 50 MB and prepares them for side-by-side viewing.

Step 2 – Start the comparison

Click the Compare button. Both PDFs open together, letting you move through pages and spot text or content differences easily.

Step 3 – Review differences

Highlighted sections show where the files don’t match. Scroll through to Compare PDF Files across all pages and confirm every change.

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Compare PDF Files Online

Need to check the difference between two documents quickly? Our free Compare PDF Files tool lets you view two PDFs side-by-side and highlights the differences. No software download is required, everything runs securely in your browser.

Why Use a PDF Comparison Tool?

PDF files are the standard for reports, contracts, and official documents. Sometimes, a new version of a file has edits, but it’s not always clear where those changes are. Using a tool to compare PDF files online helps you:

  • Detect text changes between two versions
  • Verify updates in contracts, invoices, or reports
  • Save time instead of manually reading every page
  • Ensure accuracy before sending or approving documents

Features of This Compare PDF Files Tool

  • Side-by-side viewer for both PDFs
  • Automatic difference detection on each page
  • Page navigation controls for easy browsing
  • Completely secure – files are processed in your browser only
  • Supports files up to 50 MB in size

Benefits of Comparing PDF Files Online

  • No installation or software required
  • Instant results, even for multi-page PDFs
  • Works on desktop, tablet, and mobile browsers
  • Protects your privacy since documents never leave your device

Frequently Asked Questions (FAQ)

This tool provides a visual side-by-side comparison. It renders each PDF so you can manually inspect differences page by page. It may also show basic metadata differences like page count. It does not perform an automated pixel-level or text-level diff analysis. If the text content on the current pages differs, the respective PDF view will be highlighted with a colored border.

No, your PDF files are processed directly in your web browser. They are not uploaded to any server, ensuring your data remains private and secure.

Yes, for performance reasons, there’s a recommended file size limit (e.g., 50MB per file). Very large or complex PDFs might take longer to load and render in your browser.

This tool currently does not support password-protected PDFs. You will need to remove the password protection before uploading them for comparison.

The tool will display the page counts for each PDF. You can navigate through each document independently. The comparison will naturally highlight if one document has more pages than the other.