#163 · PDF Inspection & Validation Tool

PDF Color Usage Analyzer

Estimate which PDF pages use color, grayscale, or monochrome painting operations through local content-stream analysis.

PDF Tool

One PDF required
pages
Ad space

How to use this PDF tool

  1. Select one PDF.
  2. Review the scope and start the local analysis.
  3. Check the on-page summary, then download the JSON report.

What this tool does

The analyzer examines page drawing operators and records color-space and color-setting commands. It is useful for print triage, not color-management certification.

PDF.js operator lists are scanned for RGB, CMYK, gray, and named color-space operations, then summarized by page.

Colors inside images, shadings, patterns, or unsupported operators may be classified approximately.

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 PDF Color Usage Analyzer 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 PDF Color Usage Analyzer 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 PDF Color Usage Analyzer report contain?

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

Will PDF Color Usage Analyzer 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 PDF Color Usage Analyzer for production preflight?

Colors inside images, shadings, patterns, or unsupported operators may be classified approximately. 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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