Digitally Sign PDF

Add a digital signature with audit trail

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Accepted: .pdf · Files stay in your browser

Free · No signup · No watermarks · Files never leave your browser

How to use Digitally Sign PDF

  1. Upload your file using the drop zone above.
  2. Adjust any options for the digitally sign pdf task.
  3. Click Process and download your result instantly.

Why use PDFzelo Digitally Sign PDF?

Add a digital signature with audit trail. PDFzelo processes everything locally in your browser — no uploads, no waiting rooms, no accounts. It works on Windows, Mac, Linux, Chromebook, Android and iPhone.

Frequently asked questions

How do I sign?

Draw, type or upload your signature, place it, and download with a tamper-evident seal.