Scan Image Cleaner Online — Remove Background Tint & Shadows
Clean up scanned documents and phone-camera captures. Removes murky shadows and yellow paper tint while boosting black/blue ink contrast.
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Processing...How to use Scan Image Cleaner
- 1 Upload a photo or scan of your document, certificate, or marksheet.
- 2 Choose a quick filter: "Crisp Black & White", "Magic Color", or "Document Gray".
- 3 Adjust the Brightness, Contrast, and Threshold sliders to fine-tune readability.
- 4 Use the Straighten slider to fix any accidental tilt.
- 5 Click "Download Clean Document" to save the high-contrast file.
Key Features
- One-click document thresholding transforms gray phone photos into scanner-like scans
- Removes finger shadows, uneven lighting, and yellow/sepia paper tint
- Straighten slider (-45° to +45°) fixes angled camera captures
- Binarization filter ensures maximum legibility for official verification
- Private and local execution via HTML5 Canvas
Official Portal Use Cases
- Cleaning marksheet and certificate photos taken with mobile phones
- CSC centers digitizing land records, ration cards, and caste certificates
- Students preparing handwritten notes and assignments for online submission
Troubleshooting Tips
- If text strokes appear broken after applying B&W filter, slightly reduce the Threshold slider.
Frequently Asked Questions — Scan Image Cleaner
Quick answers to common questions
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