Encrypt PDF
Protect PDF files directly in your browser with AES-256 encryption, no upload, and optional permissions.
No upload
Input
Protect PDF files locally with AES-256 encryption and a password. Contents and passwords are not uploaded.
Encrypted PDFs are not PDF/A-compliant. Digital signatures become cryptographically invalid.
Security
Use at least 16 characters and no reused password.
Weak
One opening password, all normal PDF functions allowed. The generated permissions password is not stored. Use Advanced if you want to manage security settings later in a PDF editor.
Output
One encrypted PDF is created per source. Multiple results are also provided as a ZIP file.