Add Signature to PDF
Place a signature image onto a PDF at the position and page you choose.
A transparent PNG works best. The image is read in your browser and sent with the PDF for stamping.
Then upload the PDF to sign below.
How to use the Add Signature to PDF
Step 1 — Add your signature image
- Choose a PNG or JPG of your signature; a transparent PNG looks best.
Step 2 — Set placement
- Pick the position, width, and which page(s) to sign.
Step 3 — Upload the PDF
- Drop in the document to sign.
Step 4 — Download
- Save the signed PDF.
Frequently asked questions
An image of your signature — a transparent PNG is ideal, though JPG works too. You can create one by signing on paper and photographing it, or by signing on a touchscreen and exporting the image.
Wherever you choose: bottom right, bottom left, top right, top left, or centred. You also set its width in millimetres, and the height scales automatically to keep the proportions.
Yes. Apply the signature to the last page (the default, common for contracts), the first page, or every page of the document.
No. This places an image of a signature onto the PDF; it does not add a cryptographic digital signature or an audit trail. For legally binding workflows use a dedicated e-signature service.
It is sent with the PDF only to stamp the document, and the temporary working files are cleared automatically a short time later. Use a plain signature image rather than other sensitive content.
About the Add Signature to PDF tool
This tool places an image of your signature onto a PDF at the position, size, and page you choose. It is the quick way to sign a contract, form, or letter you have received as a PDF, without printing, signing by hand, and scanning the page back in.
Preparing a signature image
The signature is supplied as an image, and the result looks most natural when that image is a PNG with a transparent background, so only the ink shows and the page behind it remains visible. There are two easy ways to make one: sign a blank sheet of paper in dark ink, photograph or scan it, and remove the white background; or sign directly on a phone or tablet touchscreen and export the drawing as a PNG. A plain JPG works too, but it will carry a solid rectangular background. The image is read in your browser and sent along with the PDF purely so the server can stamp it.
Placement and scope
You control exactly where the signature lands. Choose one of five positions — the four corners or the centre — and set the width in millimetres; the height adjusts automatically so your signature never looks stretched. You also decide which pages receive it: the last page, which is the usual place to sign a contract and is the default here; the first page; or every page, which suits initialling a multi-page agreement. The signature is layered on top of the existing page content, leaving the original document intact underneath.
An honest note on legal weight
It is worth being clear about what this does and does not do. It stamps a picture of a signature onto a PDF, which is perfectly fine for everyday consent, acknowledgement, and informal agreements. It is not a cryptographic digital signature: it does not bind the signature to your identity, does not detect later tampering, and does not create the audit trail that some contracts and regulations require. When a transaction needs a legally robust electronic signature, use a dedicated e-signature service built for that purpose. Files here are processed on the server and the temporary copies are removed automatically a short time afterwards. To add dates or names alongside the signature, combine this with the Add Header and Footer to PDF tool.