Sign PDF

Digitally sign PDFs with a certificate from a Windows USB signing key.

Connect the USB signing key and make sure its Windows driver or token middleware is installed. This page does not read a normal USB drive directly. It only lists signing certificates that Windows has already loaded from a cryptographic token into the Personal certificate store. Your private key remains on the device, and the token software may open a secure PIN prompt while signing.

Sign with a USB certificate

Create an Adobe-compatible cryptographic signature using a certificate in the Windows Personal store.

PDF document

Drag and drop a PDF here, or click to select

Maximum size: 100 MB

Certificate from USB signing key

Reason for signing (optional)

Location (optional)

This local integration currently supports Windows certificate-store tokens. It does not upload the certificate, PIN, PDF, or private key to an external service.