Question 1

How do I add a password to a PDF?

Accepted Answer

Drop your PDF onto the tool, set a user password (required to open) and optionally an owner password (required to change permissions), then click Protect. Your encrypted PDF is downloaded instantly. All encryption happens locally with pdf-lib and 128-bit AES.

Question 2

What is the difference between user and owner password?

Accepted Answer

The user password is required to open and view the PDF. The owner password controls who can change permissions like printing, copying or editing. You can leave the owner password empty to use the same password for both.

Question 3

Is my PDF uploaded anywhere?

Accepted Answer

No. The PDF is read and encrypted entirely inside your browser using the pdf-lib JavaScript library. The file never touches a server, so your documents and passwords stay private.

Question 4

Can I unlock the PDF later?

Accepted Answer

Yes — use our companion PDF Unlock tool. It removes the password from a PDF using the owner password so you can share an unprotected version.

👤

👑