How to Copy and Edit Protected PDF Files?
Great security is one of the reasons why so many people use PDF format. A PDF author can set password to prevent readers from opening it, or set restriction for copying the text or printing the PDF document. They are the “User Password” and “Owner Password”. But the security also bothers many PDF users. In some situations, we need to copy the text from a PDF, print the PDF out or edit the PDF, legally of course. For example, we need to open or edit an old PDF file but we forget the password. Or the professor allows me to quote the content of his research, but he forgets to remove the restriction. Or the boss needs the report which is created by a former colleague but he is not working for the company anymore. What can we do if we meet the situations above? If we know there are some ways to remove the restrictions of PDF files, we won’t spend money to hire some freelancers to retype the whole PDF files into Word format. However, we should know that cracking PDF user password is a diffic
