How to use it
- Sign on plain white paper with a dark pen. A thicker pen gives a clearer result at small sizes.
- Take a photo from straight above, in even light, with the signature filling most of the picture.
- Choose the photo. The cleaned version appears next to it.
- If strokes look broken or faint, move the cleanup slider toward Darker. If grey patches remain, move it toward Lighter.
- Enter the form's size limit and, if it gives them, the width and height in pixels. Press Make signature.
What it does
The tool works out how bright the paper is across the whole photo, so shadows and uneven light are removed instead of turning grey. It then separates the ink from the paper, drops small specks and anything touching the edge of the photo (such as a table or the edge of the page), and crops to the signature with a small margin.
With both a width and a height, the signature is scaled to fit inside that size and centred on a white background, so the image is exactly the size the form asks for.
Limits
- Only the signature should be in the photo. Printed lines or text near it may be kept as if they were ink. Crop the photo first or sign on a blank sheet.
- Very light pencil or faint ink may break up. Sign again with a darker pen.
- Transparent PNGs are bigger than JPGs. If the form has a small KB limit, use a white background.
Questions
Should I keep the blue ink?
Only if the form asks for it. Most forms accept black, and black stays clearer at small sizes. Choose Keep the pen's colour if the instructions say "blue ink" or "in colour".
Can I use the transparent PNG to sign a PDF?
Yes. Many PDF apps let you add an image as a signature. On this site, Sign and fill a PDF lets you draw or type a signature directly.
Is it safe to make a copy of my signature?
Your photo is processed in your browser and never uploaded. Keep the saved file somewhere private, and only upload it to forms you trust.
Last updated 2026-10-23.