Add a Background to a Stamp
Put solid paper back behind a transparent seal so it survives JPG conversion, email clients, and upload forms that cannot handle alpha.
Free preview · No signup · ~10 seconds
Drop a transparent stamp PNG
PNG, JPG, WebP, SVG or a 1-page PDF — up to 20 MB
Runs entirely in your browser. Your image is never uploaded.
When a seal needs paper behind it
Filled behind, not painted over
The colour is composited underneath the ink, so it appears only where the image is transparent. The seal itself is never covered, and its soft edges blend into the new colour rather than against a checkerboard.
The black rectangle problem
Plenty of systems render transparency as black. A transparent seal that looks right on your screen can arrive as a black block in an email client or an older document viewer, which is a conspicuous way for an official document to go wrong.
Portals that only take JPG
Many government and banking systems accept JPG alone, and JPG has no alpha channel. Converting a transparent seal straight to JPG lets the encoder choose the fill. Choosing it yourself means you know exactly what the reviewer will see.
Match the paper, not just white
Pure white suits a white page. If the seal will sit on a cream certificate or a tinted form, sample that colour instead — a near-miss is more noticeable than an obvious contrast, because the eye finds the rectangle edge immediately.
Nothing shifts
Only transparent pixels are filled. Width and height are unchanged, so the seal stays exactly where it was. Use Add Padding if you also want space around it.
How to add a background to a stamp
Upload the stamp
Drop in a transparent seal PNG, or any stamp image you want flattened. Scanned to PDF instead? A single-page PDF works as well — page 1 is turned into an image in your browser.
Pick the paper colour
White by default. Match the exact colour of the document the seal will sit on if it is not plain white.
Download
Take a free preview, or download the full-resolution file with one credit.
Where a solid background is required
Email attachments
Stop a transparent seal arriving as a black block in a client that ignores alpha.
JPG-only uploads
Prepare a seal for portals that reject PNG, deciding the fill yourself.
Official submissions
Meet strict file requirements without leaving the background to an encoder default.
Print runs
Give the printer a defined background instead of letting them assume 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.
Add a background to your stamp
Upload, pick the paper colour, and download the flattened seal.