Transparent Stamp Maker
Turn a scan or photo of a rubber stamp into a transparent PNG you can place over any document without a white box around it.
Free preview · No signup · ~10 seconds
Drop a scan, photo or 1-page PDF of a stamp
PNG, JPG, WebP, SVG or a 1-page PDF — up to 20 MB
Runs entirely in your browser. Your image is never uploaded.
What a scanned seal actually looks like to software
Ink that sits far from paper
Most seals are stamped in saturated red or blue. That is good news: the ink is a long way from white in colour terms, so a lower tolerance than a pencil signature needs will separate them cleanly. Thirty is a sensible starting point.
Reading the tolerance
Matching happens in Lab colour space, which measures difference the way the eye does rather than by raw RGB distance. Raise the slider until the paper is gone. On a red seal you can usually go further than you expect before the ink starts to erode, because red and white are so far apart.
Stamps land on top of other things
A seal is usually applied over printed text or a signature, and those are not the paper colour, so they survive the cut. If your scan has text under the stamp, crop tightly first or accept that the text comes with it.
Uneven ink is normal
Rubber stamps never print evenly. Pressure varies, ink pools at the edges of the die and thins in the middle, and a genuine impression has gaps. Do not raise tolerance chasing a perfectly solid shape — the unevenness is what makes it look real rather than drawn.
The output is PNG
Transparency needs an alpha channel and JPG has none. Saving the result as JPG afterwards would put the white rectangle straight back, which is the thing you removed.
How to transparent stamp maker
Upload the stamp
Drop in a scan or photo. A stamp on clean white paper with nothing printed underneath cuts out best. Scanned to PDF instead? A single-page PDF works as well — page 1 is turned into an image in your browser.
Clear the paper
The paper colour defaults to white. Raise the tolerance until only the ink is left on the checkerboard.
Download
Take a free preview to check the edges, or download the full-resolution transparent PNG with one credit.
Where a transparent stamp is needed
Approving documents
Place a company seal on a PDF without a white block covering the text beneath it.
Company chops and seals
Digitise an official seal so it can be applied to files rather than printed pages.
Certificates
Add an authorising seal over a designed background that stays visible.
Invoices and shipping papers
Mark documents as paid or approved without rescanning each one.
Or just ask
Describe the edit in your own words
Type what you want changed and the assistant does it on the canvas — each step lands as a layer you can reopen, so nothing it does is baked in.
No edits yet.
Frequently Asked Questions
Related Tools
Guides worth reading
How to Fix Blurry or Fringed Edges on a Transparent PNG
Why your transparent PNG has a white halo, a grey fringe or soft edges — the four real causes, how to tell them apart in seconds, and the fix for each.
SVG vs PNG for Logos: Which File Do You Actually Need?
What SVG and PNG really are, where each one wins, why your developer keeps asking for the SVG, and the three files that cover almost every request.
How to Make a Duotone Image in Figma (Building One From Blend Modes)
Figma has no duotone effect. You assemble one from a desaturated image and two blended rectangles — here is the layer stack, the order that matters, and an honest account of what it costs to maintain.
Make your stamp transparent
Upload a scan, clear the paper, and download a transparent PNG.