P
plain.tools

Sign PDF

Add a visual signature to PDF pages locally using draw or typed input. Private browser processing with no uploads.

Processed locally in your browser. Files never leave your device.

  • Processed locally in your browser
  • Files never leave your device
  • No account required for local processing

Visual signature placement only. This is not a cryptographic certificate workflow.

Loading tool...
Learn more about this workflow: How to Sign a PDF Without Uploading It