Protect PDF – FreeToolSuite

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Protect PDF with Password

Add a password to your PDF to prevent unauthorized access. Set permissions to control printing, copying and editing.

✅ 100% Free 🔒 AES-256 Encryption 🛡️ Set Permissions ⚡ Instant Protection

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Password Protection

Set an open password so only people with the password can view the PDF.

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Permission Control

Restrict printing, copying, editing and commenting on your protected PDF.

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AES-256 Encryption

Industry-standard encryption keeps your documents safe from unauthorized access.

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100% Private

Everything runs in your browser. Your file and password never leave your device.

🔒 Protect Your PDF

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Drop your PDF file here

or click to browse — your file stays 100% private

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🔑 Set Password

Open Password

Confirm Password

🔐 Encryption Level

🔒 128-bit RC4

Compatible with older PDF readers

Standard

🔐 AES-256

Industry standard. Recommended.

Recommended

🛡️ AES-256 Max

Maximum security with owner lock

Maximum

🛡️ Permissions — what others CAN do

🖨️ Allow Printing

📋 Allow Copying Text

✏️ Allow Editing

💬 Allow Comments

📝 Allow Filling Forms

📑 Allow Page Assembly

Preparing… 0%

📂 Reading PDF

🔐 Applying encryption

🛡️ Setting permissions

✅ Finalizing

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PDF Protected Successfully!

Your PDF is now password protected and ready to download.

📖 How to Password Protect a PDF

Upload Your PDF

Click "Choose PDF File" or drag and drop your PDF. Your file never leaves your browser.

Set Your Password

Enter an open password and confirm it. Use a strong password with letters, numbers and symbols.

Choose Encryption & Permissions

Select the encryption level and toggle what others are allowed to do with the PDF.

Download Protected PDF

Click "Protect PDF" and download your encrypted, password-protected file instantly.

❓ Frequently Asked Questions

What is the difference between an open password and permissions?+

An open password (also called a user password) is required to open and view the PDF. Permissions control what viewers can do once they have opened the file — such as printing, copying or editing.

Which encryption level should I choose?+

AES-256 is recommended for most users — it is the industry standard and supported by all modern PDF readers. Use 128-bit RC4 only if the recipient uses an older PDF reader. AES-256 Max adds the strongest owner-level lock.

Is my password stored or sent anywhere?+

No. Your password and file are never sent to any server. All encryption is performed locally in your browser. We have no access to your password or your document at any point.

What happens if I forget my password?+

There is no way to recover a lost password as we do not store it anywhere. Please save your password in a secure location such as a password manager before protecting your PDF.

Can I protect a PDF that is already password protected?+

You will need to remove the existing password first using our "Remove PDF Password" tool, then re-protect it with your new password and settings.

Does protecting a PDF affect its content or quality?+

No. Adding password protection only adds a security layer to the PDF. All text, images, fonts and formatting remain completely unchanged.

Can I remove the password later?+

Yes! Use our "Remove PDF Password" tool to unlock your protected PDF at any time. You will need the original password to remove it.