How to disable editing in a PDF file becomes a big query when PDF owner wants to prevent anyone from editing document. Sometimes schools, companies and legal departments require sharing essential information with their team members or students, but don't want to give permission to edit that document. In such situation they can restrict editing PDF files by modifying few "Security Features" in the Acrobat pro. And this is only an easy way to prevent PDF from editing with others for mainly data security purpose. Please note that the given process will work properly for all Acrobat programs (Pro, Standard and Suite). Acrobat also can be used to restrict pdf to print or disable copying PDF content.
In this way use can easily protect PDF files from editing. But in some cases user forgot to enter password need to unlock PDF to edit again. As well as some other ones need to edit restricted PDF file in a legal way that time a free online tool can be used.