#168 · PDF Comparison & QA Tool

Compare PDF Links

Compare external URLs, internal destinations, link labels, and page locations across two PDF files.

PDF Tool

Two PDFs required
pages
Ad space

How to use this PDF tool

  1. Select exactly two PDFs in comparison order.
  2. Review the scope and start the local analysis.
  3. Check the on-page summary, then download the JSON report.

What this tool does

Link annotations exposed by PDF.js are collected from every page. The report separates added, removed, and matching link records.

Normalized link signatures combine page, URL or destination, and annotation rectangle before set comparison.

Links embedded only in page artwork or JavaScript actions are not treated as standard link annotations.

Supported formats

This page accepts standard PDF files readable by PDF.js. Password-protected, damaged, unusually large, and dynamic XFA documents may be unsupported.

InputSupport
PDFSupported
Encrypted PDFLimited
Dynamic XFALimited

Tips for better results

  • Use original PDFs rather than scans of printed pages.
  • For comparisons, select the older PDF first and the revised PDF second.
  • Verify flagged findings in a desktop PDF viewer before production use.

FAQ

Does Compare PDF Links upload my PDF to a server?

No. The PDF is read by JavaScript in your browser. The page does not add a file-upload request.

Can Compare PDF Links read password-protected PDF files?

A PDF that requires a password may not open. Remove authorized encryption first, then run the inspection again.

What does the downloaded Compare PDF Links report contain?

The JSON report contains the source file names, analysis time, supported findings, and tool-specific differences or warnings.

Will Compare PDF Links work with very large PDFs?

Large or image-heavy PDFs can use substantial memory. Close other tabs and test a smaller copy if the browser becomes slow.

How accurate is Compare PDF Links for production preflight?

Links embedded only in page artwork or JavaScript actions are not treated as standard link annotations. For regulated or press-critical work, confirm the result with a dedicated desktop preflight application.

Report fields

FieldMeaning
sourceFilesLocal input names and sizes
resultTool-specific findings
generatedAtReport creation time

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