Auto-Crop Signature
Automatically detect your signature on a scanned page and crop tight to its bounds.
Related Tools
Fix Signature Color
Convert blue or red ink signatures to pure black as required by most government portals.
Aspect Ratio Calculator
Calculate new dimensions while locking aspect ratio. Includes common passport photo ratios.
Image Info Viewer
Instantly check image dimensions, file size, and format without uploading to any server.
Why Crop Your Signature?
Exam portals often have strict size limits for signature images. Uploading a full A4 scan wastes space and may be rejected. This tool automatically detects the ink area and crops tightly so only the signature remains.
How does the padding slider work?
Padding adds extra whitespace around the detected signature bounds. A value of 0 crops right to the ink edge. A value of 10–20 gives breathing room, which some portals prefer.
Is my signature secure?
Yes. All processing happens entirely in your browser. Your image is never uploaded to any server.