

If a PDF file is protected with an Owner Password, people can read it, but cannot change it. Owner Password is used to protect PDF files from copying, editing and printing. If a PDF file is protected with a User Password, people need to enter the right password to open it.
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It is used to protect PDF files from opening. User Password is also named as Open Password. There are two kinds of passwords: User Password and Owner Password. And if you have the correct authorized password, you can even remove PDF Open Password on it as well. It is a professional PDF tool to remove restrictions on copying, editing, and printing PDF files. Powerful PDF Password Unlocker can be used to decrypt password-protected Adobe Acrobat PDF files.
