A clean signature from a phone photo.
Sign on plain white paper, photograph it, and drop it here. The tool removes the grey, shadows, and paper texture, leaving a crisp black-on-white signature cropped to size — ready to upload. Everything runs in your browser.
Run a cyber café? Try batch mode: 5 customers' files at once.
For the cleanest result
Sign in dark ink on plain white paper, photograph it straight-on in good light, and avoid harsh shadows. Then nudge the ink threshold: drag left if your signature looks faint or broken, right if grey smudges or paper lines are showing through.
Then size it for your exam
Need an exact pixel size like 140×60? Run the cleaned signature through the Photo & Signature resizer to hit your exam’s precise dimensions and KB limit.
Your privacy
Your signature never leaves your device. Nothing is uploaded, stored, or logged — the cleanup runs entirely in your browser with the HTML Canvas API.
Frequently asked questions
- How should I photograph my signature for the best result?
- Sign in black or dark blue ink on plain white paper, photograph it flat in good light without shadows, and fill the frame with the signature area.
- How does the tool clean the photo?
- It separates ink from paper automatically (Otsu thresholding), turns the result pure black-on-white, and auto-crops to the signature. A manual slider lets you fine-tune if strokes look too thin or too thick.
Page updated 7 October 2026. How we check exam facts