πŸŒ— Contrast & Brightness

πŸ“Œ Scan too dark/bright
Free online tool to adjust PDF page contrast and brightness (-100 to +100). Ideal for scan enhancement. All local, no uploads.

How to Use

  1. Select PDF file
  2. Slide to adjust contrast
  3. Slide to adjust brightness
  4. Process to generate adjusted PDF
  5. Download result

FAQ

Why is text no longer selectable?
This operation rasterizes pages to images, making text non-selectable. Best for scans and image PDFs.
What is the range?
Both range from -100 to +100. 0 means no change, positive enhances, negative reduces.

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# contrast # brightness # scan enhance

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