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Set an open password for a PDF

Pdf Password
How to use
Set an open password for a PDF: the file can only be opened with the password after processing; this can also change or clear an existing password.
After uploading a PDF, enter a new password in “Set new password”; leave it empty to clear the password. If the file already has a password, enter and verify the original one in the card first, then click “Start processing”.
This sets the open (user) password, not the permission password that restricts copying and printing; the password may be up to 200 characters.
📚 Quick Tip: The Two Types of PDF Passwords
Permissions Password (Owner Password) Open Password (User Password)
Purpose: Restricts printing, copying, editing, and other operations on the PDF file, but does not restrict opening and viewing.

Can restrictions be removed without the password? Yes. Our PDF tools can easily remove these restrictions. 		Purpose: Restricts opening and viewing of the PDF file.

Can restrictions be removed without the password? Technically very difficult. Requires password cracking tools, which are only effective on simple passwords. Complex passwords may take years to crack.