Convert a Signature to a Stamp
Turn a scanned signature into a clean single-ink impression — the artwork a signature stamp is cut from, and a consistent mark for documents.
Free preview · No signup · ~10 seconds
Drop a scan or 1-page PDF of a signature
PNG, JPG, WebP, SVG or a 1-page PDF — up to 20 MB
Runs entirely in your browser. Your image is never uploaded.
From handwriting to a repeatable mark
Ink is thin, so the cut-off is low
A signature is a few dark strokes on a lot of paper, and the thin tapered ends sit closer to mid-grey than the body of the stroke. The default of 165 is deliberately lower than the other stamp pages: raise it and the tails of your letters go first.
What a die maker needs
To cut a physical signature stamp, a manufacturer needs solid strokes, transparent background and no grey. A greyscale scan makes someone at the factory choose the cut-off for you, without knowing which strokes matter.
Scan quality decides everything
A flatbed scan at 300 DPI on plain white paper thresholds beautifully. A phone photo carries shadow gradients that no single cut-off separates cleanly from the ink.
Blue or black
Blue is the traditional signature ink and signals an original rather than a photocopy. Black reads as more formal and reproduces better on a fax or a scan of a scan.
Never leaves your browser
The whole conversion runs on a canvas on your own machine. Your signature is not uploaded, stored or logged anywhere.
Transparent signature vs. signature stamp
Transparent signature
Paper removed, ink untouched
- Keeps pen pressure and texture
- Soft anti-aliased edges
- Looks handwritten
- Full range of greys
Signing a PDF or a contract
Cutting a physical die
Signature stamp
Thresholded to one ink
- No midtones at all
- Hard edges
- Looks pressed
- Single flat colour
Rubber die artwork and repeated sign-off marks
Anywhere a genuine handwritten look matters
How to convert a signature to a stamp
Upload the signature
A 300 DPI flatbed scan on plain white paper gives the cleanest result. Scanned to PDF instead? A single-page PDF works as well — page 1 is turned into an image in your browser.
Lower the cut-off carefully
Raise it until paper texture disappears, then stop before stroke ends start breaking.
Download
Free preview, or the full-resolution transparent PNG in the app.
Where a signature stamp is used
Physical signature stamps
Supply a die maker with unambiguous single-ink artwork.
Document sign-off
Place a consistent mark on forms you sign repeatedly.
Approval workflows
Combine an authorising signature with a date mark.
Email and letterheads
Add a clean sign-off that reproduces at any size.
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
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Turn your signature into a stamp
Single-ink artwork, processed entirely on your machine.