Tools / Extract stamp by colour
Extract stamp by colour
Keep ink close to a chosen colour and clear the rest.
Extract stamp by colour isolates ink near a colour you pick — ideal when a seal is stamped over printed text or a tinted form. Tune tolerance until only the seal remains, then download a transparent PNG.
Extract stamp by colour FAQ
How does extract stamp by colour work?
You pick the ink colour to keep. Pixels close to that colour stay; everything else clears so the seal sits on transparency.
What tolerance should I use for blue company seals?
Start mid-range and nudge until lettering is solid but paper tint and black body text disappear. Preview updates as you drag.
Can I extract a red rubber stamp from a form?
Yes. Sample the red ink, raise tolerance carefully so pink paper tones drop out, then download the PNG.
Does Extract upload my image to a server?
No for the primary path — extraction is designed to process in your browser. See the Privacy page for contact forms and analytics.
What file do I get after extract?
A transparent PNG ready for Stamp PDF, Sign PDF stamp fields, or document editors.