Document Management · 5 min read

Signing PDFs safely online

How to tell whether an online signature or stamp tool deserves your confidential documents.

Published Jun 12, 2026

Ask one question first: does the file leave my device? If the answer is yes, everything else — the privacy policy, the retention window, the certifications — is a promise rather than a guarantee.

Client-side tools sidestep that entirely. The document is opened by your browser, modified in memory, and written back to your downloads folder.

Look for a clear statement about processing location, HTTPS everywhere, and no forced account creation for basic operations.