How to use this tool
- Photograph or scan a signature on clean white paper.
- Move the threshold until paper disappears and ink stays solid.
- Choose black or blue ink, then download the transparent PNG.
Example
A higher threshold keeps lighter pen strokes; a lower threshold removes more paper shadows and noise.
How it works
Remove the white background from a scanned signature and download a transparent black or blue PNG. The browser decodes the source, processes its pixels with Canvas and creates a new downloadable file locally.
Frequently asked questions
Does this use AI?
No. It uses grayscale, threshold and alpha processing in Canvas, which is fast and private.
How do I get the cleanest result?
Use even lighting, white paper and a dark pen. Crop the source close to the signature first.