PDF Color / B&W Page Splitter
Intelligently detect PDF colors and separate color pages from black & white pages. Local processing protects your privacy.
⚙️ Settings
Pixel Saturation Threshold {{ config.colorThreshold }}
Color Pixel Ratio Threshold {{ config.ratioThreshold }}%
Show Page Preview (Thumbnails)
Click or drag PDF file here to upload
Supports large files, 100% processed locally, files are never uploaded to any server
{{ statusText }} {{ progress }}%
Total Pages
{{ stats.totalPages }}
Color Pages
{{ stats.colorPagesCount }}
B&W Pages
{{ stats.bwPagesCount }}
Color Pages ({{ stats.colorPagesCount }})
No color pages detected
B&W Pages ({{ stats.bwPagesCount }})
No B&W pages detected
Page preview disabled
Enable preview to show thumbnails
Recommended for very large files to save memory
Page {{ previewPageNum }} {{ previewPageIsColor ? 'Color Page' : 'B&W Page' }} (Ratio {{ (previewPageRatio * 100).toFixed(2) }}%)
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📝 How to Split a PDF File into Color and B&W Pages? Detect Page Colors to Separate B&W and Color Pages
- Import PDF: Click or drag a local PDF file into the upload area. The program will start streaming analysis and show the progress.
- View Results: Once PDF color detection is complete, you can view the statistics and thumbnails under the "Color Pages" and "B&W Pages" lists.
- Download Split PDF Files: Click the corresponding download button to save the split color or B&W PDF files.
💡 Threshold Calibration: The default parameters are optimized for visual intuition and suit most scenarios. If color detection is inaccurate, you can fine-tune settings. For old or scanned documents with yellowish backgrounds, you can adjust the "Pixel Saturation Threshold" or "Color Pixel Ratio Threshold" to optimize detection accuracy.
📖 Detailed Guides & FAQ: To learn about printing cost-saving tips and detailed steps, check the Step Guide & Saving Money Manual. For details about scanning noise tuning and handling large files, refer to the Frequently Asked Questions (FAQ).
🎯 Key Features
- Color & B&W Separation: Intelligently analyze the PDF to identify the color attributes of each page, and accurately categorize color pages and pure B&W text pages.
- Separate Download: Re-merge categorized color and black/white pages into two independent PDF files, and download with a single click.
- Save Printing Costs: Color printing is significantly more expensive than black & white. Splitting files beforehand and printing them separately can greatly reduce printing costs for contracts, bidding documents, and slides.
⚡ Product Highlights
- 100% Free: No fees required, fully replacing the color/black-and-white page splitting function of Adobe Acrobat.
- Supports Native & Scanned PDFs: Works perfectly on both native vector PDFs (Word/Excel exports) and scanned image PDFs with color noise.
- Secure Local Processing: Runs completely inside the browser sandbox. Files are processed locally and are never uploaded to any server, safeguarding your privacy.
- Optimized for Large Files: Features a "Show Page Preview" switch. Turning off previews avoids memory overhead from rendering images and increases speed by over 10%.
- High-Definition Rendering: Page previews adapt to device physical pixel ratio (devicePixelRatio), avoiding blurry renders on high-resolution screens.
- Interactive Re-calculation: Changing color ratio thresholds triggers immediate re-classification without re-parsing the PDF; changing saturation thresholds provides intuitive guidance for quick re-scanning.