Sign PDF

Place a typed or image-based signature on a PDF page. Your files never leave your device — all processing happens locally in your browser.

Private by design

Your files never leave your device. All processing happens locally in your browser — no uploads, no servers.

Drop your PDF here

or click to choose a file

Your files never leave your device.

Place a typed or image-based signature on a PDF page. All processing is local — the file never leaves your device.

Sign PDF places a visual signature on a chosen page — either a typed name rendered in bold Helvetica or an image of your handwritten signature in PNG or JPG. You pick the page and an anchor (top, middle or bottom × left, center or right), and pdf-lib stamps the signature locally in a Web Worker. This is an electronic signature image, not a cryptographic certificate signature.

How it works

How to use Sign PDF

1
Drop your PDF. Drag and drop a PDF, or choose one from your device.
2
Choose typed or image mode. Type your name, or upload a PNG/JPG scan of your signature.
3
Pick page and position. Choose the 1-based page and an anchor, with a margin in points.
4
Run Sign PDF. The signature is stamped into the page content locally and the signed PDF is offered for download.

Features

What this tool does

Typed signature rendered in bold Helvetica
Image signature from PNG or JPG with aspect ratio preserved
Nine anchor positions with a configurable margin
Live preview before download
No upload — your signature and PDF stay on your device

Limitations

Things to know

Not a digital certificate signature and provides no cryptographic proof of identity
Typed signatures use a standard font and cover Latin characters only
Image signatures keep their background unless you prepare a transparent PNG
Modifying a digitally signed PDF can invalidate its existing signature

FAQ

Frequently asked questions

Is this a legally binding digital signature?

It is a visual electronic signature image. It does not create a cryptographic certificate signature or a verifiable audit trail. For legally regulated workflows, use a qualified e-signature service or a certificate-based signature.

Can I sign every page?

One run stamps one page. Run the tool again on the output for each additional page.

Why does my signature image have a white box?

JPG images do not support transparency. Use a PNG with a transparent background if you want only the ink to appear.

Is my signature uploaded?

No. The signature image and the PDF are processed locally in your browser. Nothing is sent to a server.