Secure document sharing begins with checking the recipient, the information in the file, and the access required. Remove personal details the recipient does not need. For a private PDF, a strong password can control access, with the password sent through a separate channel.

Match Document Sharing Controls to the File's Sensitivity

Restricted links may offer named access, expiration, and revocation when the service supports them. Highly sensitive or regulated material may require an approved secure portal. Smallpdf emphasizes that password protection cannot stop an authorized recipient from making another copy, so access controls need appropriate handling practices too.