Protect PDF — Add Password to Your PDF Online Free
Protect PDF – Add Password to Your PDF Files
Keep your sensitive documents safe with our free Protect PDF tool. Add a password to any PDF file in seconds — no software installation, no account required.
Why Password-Protect Your PDF?
- Protect confidential business documents
- Secure personal files like Aadhaar, bank statements, or legal documents
- Restrict editing or printing of your PDFs
- Control who can access your shared files
Bank-Level Encryption
Our tool uses AES-128 encryption — the same standard used by banks and financial institutions — to protect your PDF with a strong password.
How to Use
- Upload your PDF by clicking "Choose File".
- Enter a strong password in the password field.
- Confirm your password by entering it again.
- Click "Protect PDF".
- Download your password-protected PDF.
Frequently Asked Questions
We use AES-128 encryption, which is widely used and highly secure for document protection.
Yes. Password-protected PDFs are compatible with Adobe Acrobat, Preview (Mac), and all standard PDF readers.
Yes. Use our Unlock PDF tool to remove the password if you know it. you can unlock it using the password with a dedicated Unlock PDF tool.
No. Files are processed and immediately deleted. We never store your documents.