Protect PDF — Add Password to PDF Online Free
Add password protection to your PDF for free. Set user and owner passwords to secure your document. No sign-up, no file uploads to servers.
Frequently Asked Questions
How do I password-protect a PDF?▼
Upload your PDF, enter a password and confirm it, then click 'Protect PDF'. Download the protected document. Anyone opening it will need the password.
What is the difference between user and owner passwords?▼
The user password is required to open and view the PDF. The owner password controls editing permissions. If you only set a user password, it will be used for both.
How secure is the protection?▼
The tool creates a clean copy of your PDF with the protection applied. For maximum security, use strong passwords with a mix of letters, numbers, and symbols.
Are my files uploaded to a server?▼
No. All processing happens entirely in your browser. Your PDF files and passwords never leave your device.
Can I remove the password later?▼
You would need to open the protected PDF with the correct password and re-save it without protection using a PDF editor.