Category
Security & signing
Passwords, redaction, signatures.
Password-protect a PDF
Lock a document, and choose what a password controls.
Redact a document
Permanently remove sensitive content, not just cover it.
Draw a signature
Sign by hand and place your signature on the page.
Digital signatures
Sign cryptographically, with your own certificate or a generated one.
Verify a signed PDF
Check whether a signed document has changed since it was signed.