How to Encrypt Your PDF with AES-256
1. Open the **Encrypt PDF** tool.
2. Select your document and enter a strong password.
3. Click **Encrypt PDF** to download your password-protected file.
June 20, 2025Updated 2026-10-013 min read
Password Protect a PDF Free — AES-256 Encryption
Add AES-256 password protection to any PDF free in your browser — no upload, no watermark. Set an open password and permissions in 30 seconds.
Frequently asked questions
Does PDFolio save or store my password?
Never. Passwords are used solely inside your local browser memory.