It is common to password protect PDF documents with sensitive data, such as bank statements, legal contracts and financial records. Sometimes it is required that the password encryption to be removed from the PDF document. If you do not have the original source document that is used to generate the PDF file, you can use the following simple workaround to create a password free copy of the PDF document.
Open the password protected PDF with Preview app in OS X. Enter the password to first unlock the document.
Select from the menu File > Export As PDF. A “Save As” file dialog box will appear. Enter a file name and select the location to save the new PDF file. This new PDF document will be password free. If you select the source PDF to save to, it will be replaced with the same document without password protection.