Security

Protect your PDF documents with passwords, encryption, redaction, and digital signatures.

Advanced security features require a Business plan or higher.

Encrypt documents with passwords

Password Protection

Restrict printing, copying, and editing

PKI-based document protection

Certificate Encryption

Permanently remove sensitive content

Remove hidden information

Cryptographic document signing

Digital Signatures

Security Overview

Feature	Purpose	Plan
Password	Control access	Pro+
Permissions	Restrict actions	Pro+
Certificates	PKI encryption	Business+
Redaction	Remove content	Business+
Sanitization	Remove metadata	Business+
Digital Signatures	Verify authenticity	Pro+

Choosing Security Methods

For Internal Documents

Password protection for sensitive files
Permissions to prevent unauthorized changes

Redaction before sharing
Sanitization to remove metadata
Password protection if needed

For Legal Documents

Digital signatures for authenticity
Certificate encryption for compliance
Audit trail documentation

Last updated on March 6, 2026

OCR Password Protection