Signature Stamp Maker

This signature stamp maker takes either input: sign in the box, or drop in a photo of a signature on paper and watch the paper disappear. What comes out is a transparent PNG rendered at the physical size of the die, with a warning if the strokes are too fine to cut.

How to supply the signature

Drawing needs a pointer. If that is not available to you, switch to upload and choose a photo or a scan instead, which reaches the same export.

Ink

The thinnest stroke lands at 0.50mm, clear of the 0.25mm floor.

Where the signature came from

Why a signature stamp maker has to remove the paper first

This is the step everything else depends on. Point a phone at a signed sheet and every pixel comes back opaque, including the whole page around the ink. Drop that into a document and you get a white rectangle sitting on top of the text, which is why so many people conclude their signature stamp does not work.

What the tool does is read each pixel's luminance and treat anything above a cut as paper. The cut is a slider because paper is not one colour: a flatbed scan comes back near white and takes a high cut cleanly, while a phone photo under room light might have paper sitting at 180 or lower, and a high cut there would take the lighter half of the strokes with it. The coverage line under the plate exists to catch exactly that, because it is easy to look at a preview and not notice that the thin parts of the signature have quietly gone.

Edges get a ramp rather than a hard cut. A single threshold leaves stair-stepped pixels along every stroke, which is invisible on screen and very visible once the same artwork is enlarged onto a die.

The number that decides whether it can be cut

A signature is mostly thin lines, and thin lines are what rubber cannot hold. The checker turns your drawing into millimetres: it takes the stroke width in pixels, divides by the width of the plate, and multiplies by the die width you chose. A 9 pixel pen on a 900 pixel plate printed 50mm wide lands at half a millimetre. The same pen on a 38mm die lands at 0.38mm, and a 4 pixel pen at 0.22mm, which is under the 0.25mm floor this page works to.

That floor is a working figure for hand-inked rubber, not a standard, and the same caution applies here as on the QR page: ink spreads sideways out of a relief, so a line that measures right in the file comes out fatter and less even on paper. When the checker fails you, the cheapest fix is usually a wider die rather than a redrawn signature.

What to feed the signature stamp maker

The four starting points on the tool are not decoration, they are different problems. A scan and a phone photo need cuts nearly 40 levels apart, and a pencil signature needs the cut pushed higher still while being forced dark on the way out, because pencil sits close to paper in luminance and stays grey otherwise.

  • Photographed on white paper. A phone photo under room light. The paper reads well below pure white, so the cut sits low and the ramp is wide. Not for: Photos with a hard shadow across the page, which no single threshold fixes.
  • Flatbed scan. A scanner lights the page evenly, so the paper is close to white and the cut can sit high without eating ink. Not for: Photos, where a high cut will take the lighter half of the strokes with it.
  • Faint or pencil signature. Light grey strokes sit close to the paper in luminance, so the cut goes high and the ink is forced dark on the way out. Not for: Clean black ink, where this will drag paper texture in with the signature.
  • Keep the original ink colour. Same paper removal, but nothing is recoloured, so a blue pen stays blue in the PNG. Not for: A rubber stamp, which is one flat colour no matter what the file says.

None of them fix a hard shadow falling across the page, and no single threshold can: the shadowed half of the paper is darker than the lit half of the ink, so any cut either keeps the shadow or loses the signature. Reshoot it flat under even light and the rest becomes easy.

Why this exports PNG and not SVG

The other tools on this site draw their artwork, so vector comes out of them for free and the SVG is the file to send a manufacturer. A signature is different. It arrives as pixels from a camera or a sensor, and getting outlines from pixels means tracing, which is a separate job with its own controls and its own way of going wrong. A badly traced signature looks like somebody else's signature, and that is a worse outcome than a clean raster.

So the export renders at the real physical size instead. Choosing 50mm at 600dpi produces an image 1181 pixels wide, with the strokes resolved at that size rather than a screen-sized picture stretched up. Ask your manufacturer what they accept before ordering: some take high resolution raster for signature dies precisely because of the tracing problem, and some do not.

The file is worth more than the stamp

A clean transparent PNG of your signature can be dropped onto any document by anyone who has it. That is the point of making one, and it is also the reason to think about where it lives afterwards. The image is read, keyed and rendered in your browser, and no copy of it leaves the tab. The page does record an anonymous event when an upload or an export happens, carrying the threshold and the size and nothing else, which is worth saying plainly rather than claiming that nothing at all is sent.

Whether a stamped or pasted signature is acceptable on a given document is a question for whoever receives it. It varies by document type and by jurisdiction, plenty of routine paperwork takes one, and plenty of things that need a witness or a notary do not. Asking costs a minute and assuming can cost a filing.

Questions people ask before ordering

How do I turn a signature on paper into a stamp?

Photograph or scan it, drop the image into the signature stamp maker above, and the near-white paper is removed so only the ink is left. That step is the whole job: a photo has no transparency, so without it your signature arrives as a white rectangle that prints over whatever it lands on. The paper cut slider decides how light a pixel has to be before it is treated as paper, and the coverage reading underneath tells you whether the setting is eating the signature or dragging the desk in with it.

Why does my signature stamp come out as a white box?

Because JPEG has no alpha channel at all, so a photo is always a full rectangle of pixels, and pale grey paper is still pixels. Software that puts your signature on a document does not know which of them you meant. Removing the paper leaves genuine transparency, and the export here is PNG for exactly that reason. If you save the result as JPEG afterwards, the white box comes straight back.

How thin can the strokes be before a rubber die cannot hold them?

The signature stamp maker works to 0.25mm as the floor, which is a working figure for hand-inked rubber rather than a published standard. The checker converts your drawing into millimetres using the die width you picked, so a hairline that looks fine on screen at 900 pixels wide can still be flagged. When it fails you have two moves: thicken the pen, or order a wider die. The same signature that fails at 38mm often passes at 68mm without being redrawn.

What resolution should I send the manufacturer?

Ask them, and default to 600dpi if they have no preference. The export renders at the physical width you chose rather than scaling a screen-sized image up, so a 50mm die at 600dpi comes out 1181 pixels wide with the strokes actually resolved at that size. 300dpi is usually enough for a self-inking die, and 1200 is worth it only if the signature has fine loops that keep failing the stroke check.

Can I get an SVG instead of a PNG?

Not from this page, and it would be dishonest to fake it. A signature that arrives as a photo is pixels, and turning pixels into clean vector outlines is a tracing problem with its own settings and its own failure modes, not a file format switch. Some manufacturers accept a high resolution PNG for a signature die precisely because tracing a signature badly is worse than not tracing it. Ask before you order, and if they insist on vector, a tracing tool is the right next step rather than this one.

Is a stamped signature legally the same as signing by hand?

That depends on the document and where you are, and no tool can answer it for you. Plenty of routine paperwork accepts a signature stamp, and plenty of documents specifically do not, including many that need a notary or a witness. Some organisations accept one for internal approvals and refuse it on anything that leaves the building. Ask whoever receives the document rather than assuming, and treat the stamp itself as something worth keeping locked up, because a signature stamp is a signature anybody holding it can apply.

Does my signature get uploaded anywhere?

The image is not. It is read, keyed and rendered into a PNG inside this tab, and no copy of it leaves your browser. To be precise rather than absolute: the page does send an anonymous event recording that an upload or an export happened, along with the threshold and the size, which is how the tool is measured. That event carries no image data and no filename. Open the network panel and drop a file in if you would rather see the difference than take it on faith.

Can I sign with a mouse and still get something usable?

It will be a drawing of your signature rather than your signature, and a signature stamp maker cannot tell the difference, and for a stamp that is often fine. A stylus or a finger on a phone gets much closer than a mouse. Whichever you use, the pen width control matters more than the drawing does: the stroke check reads that width against the die size, so a signature drawn thin and shrunk to 38mm is the combination that fails.

Related stamp tools

When the artwork is text rather than a signature