it365 Toolbox

PDF Color/Grayscale Page Counter

Free software to detect PDF page colors. Count color and B&W pages. Supports online use on Windows, Mac, and mobile devices.

⚙️ Settings
Color Pixel Ratio Threshold ? {{ config.ratioThreshold }}%
Pixel Saturation Threshold ? {{ config.colorThreshold }}
Show Page Preview (Disable for very large files) ?
PDF
Click or drag PDF file here to upload
Supports huge PDF files. 100% processed locally; files never leave your device.
PDF
{{ file.name }}
{{ formatBytes(file.size) }}
Re-upload File
{{ statusText }} {{ progress }}%
Total Pages
{{ stats.totalPages }}
Color Pages
{{ stats.colorPagesCount }}
Grayscale Pages
{{ stats.bwPagesCount }}
🔄 Re-detect Page Colors
Color Pages ({{ stats.colorPagesCount }} pages) View Page Numbers
No color pages detected
🔍 Full Preview
Page {{ page.num }} Color Ratio: {{ (page.ratio * 100).toFixed(2) }}%
Grayscale Pages ({{ stats.bwPagesCount }} pages) View Page Numbers
No grayscale pages detected
🔍 Full Preview
Page {{ page.num }} Color Ratio: {{ (page.ratio * 100).toFixed(2) }}%
👁️‍🗨️
Page preview is disabled
Turn on the switch to display preview
Recommended to turn off preview for ultra-large files
Page {{ previewPageNum }} {{ previewPageIsColor ? 'Color Page' : 'Grayscale Page' }} (Ratio {{ (previewPageRatio * 100).toFixed(2) }}%)
Copy Page Numbers
Creating PDF document...
Re-packaging selected pages for you. Please do not close this window. Download will start automatically.
🎉
New PDF file created successfully!
Browser download triggered. If it did not start, please check your browser settings.
OK

📝 Steps to Count PDF Color and Grayscale Pages

  1. Import PDF: Click the upload area to import your PDF file. The tool will automatically analyze page colors and display the progress.
  2. View Results: Once complete, view color and grayscale page counts and thumbnails in their respective columns.
  3. Download Split PDF: If needed, click the download buttons to save separate PDFs containing only color or grayscale pages.

💡 Adjustable Thresholds: The default settings are optimized to match human visual perception. If results are inaccurate (e.g. for yellowed scans or noisy backgrounds), you can tweak the Saturation or Ratio thresholds in Settings to re-analyze. Settings are saved locally for next time.

❓ FAQs

What real-world problems does this tool solve?

This tool is designed to solve the common issue discussed in the Reddit thread "How to automatically count colored pages in a PDF?". Instead of writing complex scripts or purchasing expensive software, you can use our 100% local, free browser tool to instantly scan, count, and even extract color and black-and-white pages from your PDF documents.

Why might there be slight inaccuracies in color detection?

This usually happens when scanned documents have yellowed backgrounds, noise, or dust artifacts. You can adjust the "Pixel Saturation Threshold" or "Color Pixel Ratio Threshold" in Settings to improve accuracy.

What does "local processing" mean? Is my PDF secure?

All file rendering and computation are done 100% inside your web browser. Zero bytes are uploaded to our servers, keeping your personal and commercial files completely private.

💼 Usage Scenarios

  • View & Copy Page Numbers for Split Printing: This tool offers a "View Page Numbers" and copy feature, which is extremely helpful for split printing. You can easily get exact page ranges to input into printer settings. These numbers are also useful for programming or batch script tasks.
  • Substantially Reduce Printing Costs: By obtaining page numbers and printing color/grayscale sections separately, you can avoid overpriced full-color printing fees for pages that are mostly black & white.

🎯 Features & Benefits

  • Color & Grayscale Statistics: Intelligently scan PDFs to determine page colors and classify pages into color or grayscale.
  • Calculate Total Printing Expenses: Count color vs grayscale pages before going to the print shop. Color copies are often 2x or 3x more expensive. Knowing the page distribution helps you plan your budget and avoid accidental color printing fees.
  • Extract and Split PDF: Split your original PDF into two separate files (one containing only color pages and one containing only grayscale pages) for cost-effective printing.

⚡ Key Specifications

  • 100% Free Tool: No registration or payment. Fast, online detection and statistics of PDF page colors.
  • Native & Scanned PDF Support: Accurate color recognition works on both digital vector PDFs and noisy, raster-scanned PDF images.
  • Cross-Platform Support: Optimized for Windows, Mac, iPad, iPhone, and Android browsers. No installation needed.
  • Local Sandboxed Processing: Powered by client-side WebAssembly and JS. Zero data uploads to defend commercial privacy.
  • Big File Support: A dedicated toggle to turn off visual previews prevents browser memory crashes on ultra-large documents.
  • Adjustable Color Detection: Tailor color recognition parameters. For yellowed or noisy paper documents, simply tweak the Saturation or Ratio thresholds in Settings.
  • No Login Required: Skip sign-ups or credentials. Instant access, local safety.