Add Password to PDF¶
Protect your PDF documents by adding password encryption. This prevents unauthorized users from opening or modifying your files.
Types of PDF Passwords¶
PDF supports two levels of password protection:
| Password Type | Purpose |
|---|---|
| Open password | Required to open and view the PDF |
| Permissions password | Controls what users can do (print, copy, edit) even after opening |
You can set one or both types on a single PDF.
Adding a Password¶
Step 1: Open the PDF¶
Go to PDF Tools > Add Password and open the PDF file you want to protect.
Step 2: Set Password Options¶
Choose the type of protection:
- Open password -- Enter the password that will be required to view the document
- Permissions password -- Enter a password to control document permissions
Step 3: Configure Permissions (Optional)¶
When setting a permissions password, choose which actions to allow or restrict:
- Printing -- Allow or deny printing the document
- Copying text -- Allow or deny copying text content
- Editing -- Allow or deny modifications to the document
- Annotations -- Allow or deny adding comments or annotations
Step 4: Save the Protected PDF¶
Click Apply and save the protected PDF. You can overwrite the original or save as a new file.
Remember Your Password
Store your PDF password in a safe place. If you forget it, there is no way to recover it through the application. You would need to use the Remove PDF Password feature, which requires knowing the original password or having the permissions to do so.
Best Practices¶
- Use a strong password with a mix of letters, numbers, and special characters
- Do not use the same password for the open and permissions passwords
- Keep a backup of the unprotected PDF in a secure location
- Test the protected PDF by opening it in a PDF reader to verify the password prompt appears
Batch Protection
If you need to password-protect multiple PDFs with the same settings, process them one at a time using the same password configuration. Each file is saved independently.