Scan Cleanup · Browser Tool
Enhance Scan Contrast
Upload a scan or document photo and use the sliders to adjust brightness, contrast, and sharpness independently. Choose from presets optimized for different document types — standard document, receipt, low-light photo, or faded paper — or use manual sliders for precise control. A before/after preview shows the change. Processed entirely in your browser.
Input formats
Output formats
Common uses
- Improve readability of a faded or low-contrast scan
- Enhance a dark phone photo of a document
- Prepare a scan for better OCR accuracy
- Boost a receipt photo for expense tracking
Limitations
- Cannot fix out-of-focus blur — sharpening only helps slightly-soft text.
- Cannot add detail that was not in the original image.
- Maximum image size: 30 MB.
Runs entirely in your browser
This tool processes your files locally using the Canvas API. Nothing is uploaded. Your files never leave your device.
Frequently asked questions
Start with 50 and adjust. More sharpness helps slightly soft text but can create halos around letters at very high settings. For printed documents, 40–70 usually works well.
Clean Scan is an all-in-one cleanup tool with simpler controls. Enhance Contrast has individual sliders for brightness, contrast, and sharpness separately, giving more control. Both run in your browser.