Tools / Signature Cropper

Signature Cropper

Upload a signature photo or scan, auto-crop the white margins, and knock out the background to get a clean transparent PNG of just the ink — ready for documents and online forms.

1. Upload signature

Click to upload

2. Background removal

Threshold: 230Pixels brighter than this become transparent. Lower it if the paper still shows; raise it if ink is being erased.Darken ink to solid black

3. Resize

Resize output (height auto)

Preview

Upload a signature to begin.

The checkerboard shows transparency — anything you can see through is fully transparent in the downloaded PNG.