A signature image is a picture of your written name saved as a transparent PNG — the small file people paste into contracts, invoices and email signatures. It is the simplest “digital signature” that exists, so it helps to be precise about the terms, because a signature image, an electronic signature and a qualified e-signature are not the same thing.
Signature image vs. electronic signature
A signature image is just a drawing: your name in black or blue ink rendered as pixels. An electronic signature is a broader concept — any sound, symbol or process adopted with the intent to sign, from pasting that image into a PDF to clicking “I agree” on a form. The image is one acceptable form of the electronic signature; the platforms that manage full e-sign workflows add audit trails, timestamps and tamper evidence on top.
In most jurisdictions electronic signatures are legally recognized — ESIGN in the US and eIDAS in the EU treat them as valid evidence of intent for the vast majority of contracts. Requirements vary by document type; a signature image carries less weight for high-stakes transactions, where a regulated qualified signature is expected.
Drawing a signature that looks clean
- Use a stylus if you have one — a finger leaves much thicker, wobblier strokes.
- Keep the stroke width consistent and sign in your normal motion, without slowing down mid-squiggle.
- Prefer black or blue ink; those read as “signature colors” on printed documents.
- Export at a high (2×) resolution and as transparent PNG, so only the ink shows when placed over documents.
A clean signature is one you can reproduce consistently. If words are part of your signature, write them at a comfortable size rather than tiny — a signature scaled up from something written at 8 pixels wide looks smeared no matter the resolution.
Placing the image on a document
Once you have a transparent PNG, insert it as an image over the signature line in any PDF, Word document or form. Transparent background is the crucial part: with it, only the ink appears; without it, you get a white box over the text. Paste it into email signatures the same way you would an avatar.
The security caveat
Anyone who possesses your signature image could paste it onto a document, so treat the file like a signing stamp: keep it private and never email the PNG casually. This is also why the generator runs entirely in your browser — the drawing is reflected in memory only, is wiped when you close the tab, and is never uploaded or stored anywhere.
