Sign PDF

Draw your signature with your mouse or finger, or upload an image of one, then drag it into position on any page and save a signed copy of the PDF. This adds a visible signature only — it does not create a certified digital signature — and everything happens locally in your browser.

PDF Tools Runs entirely in your browser

Your file and signature are processed on your device only — neither is ever uploaded to our servers.

This tool only adds a visible signature to the file; it does not create a certified digital signature.

Drag a PDF file here or choose one

One file at a time

Choose a file

What this tool does

Places an image of your signature at a position you pick on a page of a PDF. You page through the document visually, click where you want it, and the signature is baked into that spot in the resulting file.

When to use it

A contract or form needs signing and you would rather not print, sign and scan it again.
You have several documents to sign quickly with the same signature image.
You need the signature in one precise spot rather than wherever a tool decides to put it.

How to use it

Drag a PDF onto the drop area or choose it; a page preview and the page count appear.
Upload your signature image — a PNG with a transparent background works best, because it blends into the page with no white box around it.
Page through the document until you reach the page you need.
Click the spot where the signature should go to place it there, then download the signed file.

A practical example

Input

A 6-page contract, a transparent PNG signature, and a click at the bottom right of the last page.

Output

A copy of the contract with the signature baked into exactly that position on page 6.

Limitations

This is a visible signature drawn onto the page, not a certificate-backed digital signature. The result carries no cryptographic proof of who signed it or that the file was not altered afterwards.
Nothing here asserts that such a signature will be accepted — that depends on the recipient and on the law where you are.
A signature image with a white background will sit in a white box that covers whatever is under it; use a transparent PNG to avoid that.
Password-protected files need to be unlocked first.

Privacy and processing

Both the document and your signature image stay on your device; the merge happens in the browser and neither is uploaded.

Technical notes

The signature image is embedded into the page with pdf-lib at the coordinates you clicked.
The document's other pages are carried across unchanged, so their text and quality are unaffected.