Sign PDF
Add your signature to any PDF. Draw, type, or upload — your document never leaves your device.
100% private — processed on your deviceDrop your files here
or click to browse — add as many as you like
Your signature
Local processing
Files never leave your device
Add your signature to any PDF right in your browser — draw it, type it, or upload an image. PDF Bunker signs locally, so your document is never uploaded to a server.
How it works
- 1Drop your PDF into the upload area, or click to browse for it.
- 2Create your signature by drawing it, typing your name, or uploading an image.
- 3Click the spot on the page where you want the signature placed.
- 4Click Sign & Download to save the signed PDF to your device.
Frequently asked questions
Is my document uploaded when I sign it?
No. Signing happens entirely in your browser. Your PDF and your signature never leave your device.
Is a signature added this way legally valid?
It adds a visible signature image to the document, which is widely accepted for everyday agreements. It is not a cryptographic digital signature.
Does it work offline?
Yes — once the page has loaded, you can sign with your internet disconnected.
Do I need an account?
No. Anonymous users get up to 5 operations per day; a free account gives unlimited basic operations.