Protect PDF - Add Password to PDF Online Free

🔒 Protect PDF

Add real password encryption to your PDF files

✨ 100% Free 🔒 AES-256 Encryption ⚡ Instant 🛡️ Real Protection

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Drop PDF file here or click to select

Your PDF will be encrypted with a password

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Real PDF Encryption

This tool applies AES-256 encryption to your PDF. The file will require the password to open. All processing happens locally in your browser - files never leave your device.

🔑 Password Settings

🔐 Document Password Required to open the PDF

Enter a password

🔐 Confirm Password Re-enter to confirm

🛡️ Permission Restrictions

Prevent Printing

Disable print functionality

Prevent Copying

Block text selection & copy

Prevent Editing

Block modifications

Prevent Annotations

Block comments & forms

🔐 Encryption Level

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AES-128

Strong encryption

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AES-256

Maximum security (recommended)

Processing...

✅ PDF Encrypted Successfully!

🔑 Password: ••••••••

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Pages

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File Size

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Encryption

⬇️ Download Protected PDF

💡 About PDF Encryption

• Real Encryption: Uses AES-256 bit encryption - the same standard used by banks and governments.
• 100% Private: All processing happens in your browser. Files never leave your device.
• Remember Password: Store your password safely - it cannot be recovered if lost.
• Compatibility: Works with all modern PDF readers (Adobe, Chrome, Firefox, etc.).