Protect PDF with Password
Add a password to any PDF file — recipients will need the password to open it.
Files are processed securely and deleted within 1 hour. We never store or share your files.
How to add a password to a PDF
- Enter a password in the password field — it must be at least 4 characters long.
- Upload your PDF by clicking or dragging it into the upload area.
- The server encrypts the PDF with your chosen password using AES encryption.
- Download the protected PDF — anyone who opens it will be prompted for the password.
Why use Formfy's PDF protection tool?
Adding a password to a PDF is the simplest way to restrict access to sensitive documents before sharing them by email or cloud storage. Whether you're sending a contract, a financial report, or confidential medical records, password protection ensures only the intended recipient can open the file.
Formfy's protect tool applies AES encryption via pdf-lib and is fully compatible with Adobe Acrobat, Preview on macOS, and all major PDF viewers. Files are deleted from our servers within 1 hour. To remove the password later, use the Unlock PDF tool with the same password you set here.
Frequently Asked Questions
How do I add a password to a PDF?
Upload your PDF, enter a password (minimum 4 characters), and click Protect PDF. The downloaded PDF will require the password to open.
What type of encryption is used?
PDF password protection uses AES encryption via the pdf-lib library.
Can I set different passwords for opening and editing?
The current tool uses the same password for both user and owner access, which restricts editing and printing.
Can I remove the password later?
Yes. Use the Unlock PDF tool with the same password to remove the protection.
Is my file uploaded to a server?
Yes, password protection requires server-side processing. Files are deleted within 1 hour.