🔒 100% Client-Side • Zero Server Uploads
Document Scanner & Background Cleaner — Whiten Shadows & Clean Scans
Remove gray shadows, desk backgrounds, and phone camera glare from document photos. Turns phone photos into clean, printable white documents.
Security Guarantee: Pixel contrast adjustments, thresholding, and color filtering run completely locally via Canvas API on your CPU/GPU.
How to Use Background Cleaner
Step 1: Upload Photo of Paper Document
Select a photo of a contract, receipt, or signature taken with your phone.
Step 2: Adjust Threshold & Contrast
Fine-tune the contrast slider until background shadows disappear.
Step 3: Download Clean Scan
Download the enhanced crisp document ready for filing or printing.
Frequently Asked Questions
How does the document background cleaner work?
It uses adaptive image thresholding on the HTML5 Canvas to separate dark text and ink lines from the lighter paper background, neutralizing yellow lighting and shadows to deliver a clean black-and-white or high-contrast color scan.
Can I use this to extract clean signatures with transparent backgrounds?
Yes. By enabling "Transparent Mode", the tool removes white paper background entirely, leaving only the ink signature with an alpha transparency channel.