⚫ Binarize PDF

πŸ“Œ Pure black & white
Free online PDF binarization tool. Convert pages to pure B&W with manual or Otsu auto threshold. Great for printing and archiving.

How to Use

  1. Select PDF file
  2. Enter threshold or check Otsu auto
  3. Process to binarize
  4. Download pure B&W PDF

FAQ

What is Otsu auto threshold?
Otsu algorithm calculates the optimal threshold automatically β€” no manual tuning needed.
What does threshold 128 mean?
Pixels with grayscale >=128 become white, <128 become black. Lower threshold = more black.

Related Tools

πŸ“Ž Merge PDF βœ‚οΈ Extract / Delete Pages 🧩 Split into Single Pages 🎴 Split Odd/Even Pages πŸ“š Split by Page Count πŸ”„ Rotate Pages

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# binarize # threshold # B&W

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