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Free Signature Cleaner
Clean a photo or scan of your signature in your browser — remove the paper background (white or transparent), darken the ink, and download a PNG. Nothing is uploaded.
Tool
How it’s calculated
- Runs entirely in your browser using the Canvas API — your image is never uploaded.
- Pixels brighter than the threshold become background (white or transparent); darker pixels are kept as ink (optionally darkened to black or blue).
- Best with a clear, well-lit photo or scan of a signature on plain white paper.
This tool gives an estimate for planning. Check the result against your own records before acting on it.
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