Protect PDF

Add password protection to your PDF with AES-256 encryption. Encrypted files can only be opened via ToolsLead Unlock.

🔒 How it works: Your PDF is encrypted with AES-256-GCM using PBKDF2 (120k iterations). Standard PDF viewers will not open it — use Unlock PDF with the same password to decrypt.

Password

Enter a strong password (min 4 characters). You’ll need it to unlock.