How do I Unlock PDF Files with Password?

Hello everyone,
I’m trying to figure out the best way to unlock or remove restrictions from PDF files that are protected with a password. I have several PDFs where restrictions prevent printing, copying, or editing, and in some cases I no longer have the password. These files are important, so I’m looking for a safe and reliable solution that doesn’t alter the original content.

While researching, I found SysTools PDF Password Unlocker, which appears to be one of the best solutions available. It can remove both owner-level restrictions and open passwords from PDF files, supports all PDF versions, and works with strong encryption. The tool allows users to unlock PDFs in bulk and enables full access like editing, copying, and printing without data loss.

Has anyone used SysTools PDF Unlocker or any other effective method to unlock password-protected PDFs? I’d appreciate your recommendations and experiences.