PDF
Drop a PDF file hereAbout Protect PDF
Protect PDF adds an open password to a PDF so the password is required before the document can be viewed. Set a password and create an AES-256 protected copy.
How to use Protect PDF
- 1
Choose the PDF you want to protect.
- 2
Enter and confirm a password.
- 3
Check the password strength and click Protect PDF.
- 4
Download the password-protected PDF.
Tips for better results
- Use a long, unique password that is difficult to guess.
- Keep a secure copy of the password because a lost password may prevent access to the document.
- For an already protected PDF, remove the current password before setting a new one.
Frequently asked questions
What encryption is used?
The protected PDF is created with AES-256 encryption.
Can I change the password of an already protected PDF?
Remove the existing password first, then protect the unlocked PDF with a new password.
Will the PDF ask for the password when opened?
Yes. Compatible PDF readers will request the password before opening the protected document.