KOEN

Sign PDF & Fill Text

PDF · SIGN

Add a handwritten signature, text, dates and check marks to any PDF, drag and resize them, then save. Everything runs in your browser, nothing is uploaded.

This adds a signature image, not a certified digital signature, and its legal validity isn't guaranteed. For contracts and other legally binding documents, use a method agreed with the other party or a trusted e-signature service.

Your file is processed entirely in this browser. Nothing is uploaded or stored on a server. Signatures you draw are gone when you close this tab.pdf-lib (MIT) · pdf.js (Apache-2.0)

HOW TO

How to use

  1. Drop the PDF you want to sign. All pages open in a scrollable view.
  2. Press Signature to draw one or upload a photo of it (the white background turns transparent). It lands on the page you're viewing.
  3. Add text, dates or check marks, drag them into place and resize from the bottom-right corner. Change text, color and date format in the side panel.
  4. Press Save signed PDF to download a copy with your additions. The original content stays untouched.
PAIRS WELL WITH

Pairs well with

FAQ

FAQ

Is a signature added this way legally binding?

Not necessarily. This tool places an image of your signature on the PDF; it isn't a certificate-based digital signature. For contracts and other important documents, use a method the other party accepts or a dedicated e-signature service.

Are my files uploaded?

No. The PDF and your signature are processed entirely in your browser and never sent to a server. Signatures you create can be reused until you close this tab.

Which characters can I type?

Latin letters, numbers and Korean are supported. The first time you add text, a font is loaded and only the characters you use are embedded in the PDF, so it can take a few seconds once.

Can it fill in PDF form fields?

It doesn't fill interactive form fields directly, but you can drag text boxes on top of the fields to fill them in.