Home › Protect PDF
Protect PDF — Free Online
Protect PDF adds a password so only people with the password can open your document. It runs in your browser.
Open Protect PDF tool →
✓ 100% free
✓ No sign-up
✓ No file upload
✓ Works in your browser
How to Protect PDF
- 1Open the Protect PDF tool and add your PDF.
- 2Enter a strong password.
- 3Click Protect to encrypt the file.
- 4Download your password-protected PDF.
Open Protect PDF tool →
Why use Protect PDF?
A password keeps sensitive documents private so only people you trust can open them.
Common use cases
- Protect bank statements or payslips before emailing.
- Secure a confidential contract.
- Lock personal ID documents.
Tips
- Use a strong, unique password and share it separately.
- Keep an unprotected backup in a safe place.
Frequently asked questions
How do I add a password to a PDF?
Open the Protect PDF tool, type a password, click Protect, then download the encrypted PDF.
Is it free?
Yes, protecting PDFs is free.
Is my password sent anywhere?
No, encryption happens in your browser and nothing is uploaded.