Contrary to what has happened with its plug-in for browsers, Adobe PDF files remain a standard especially in business environments, where documents with signatures and other sensitive data They are password protected, integrating editable fields in certain parts of the document or simply scanned documents are collected in this format.
This time we will focus on the password aspect to protect the content of the files, in such a way that only "authorized" users will be able to access and read the data contained within said document. Now we will see how remove password from file PDF or change it simply using the preview utility.
Obviously to carry out these operations, we must first know the password with which the PDF file is encrypted, since otherwise we will not be able to continue. The way to do it is very simple, the first thing we have to do is open PDF file encryption and enter the password to access it, once inside the file we will move to the File menu in the "Save as" option.
The next step is to leave the "Encrypt" box unchecked, at that time we will choose to save it as PDF format so that it is automatically saved as a unencrypted file. This will replace the source file with a new one that will no longer be password protected, if instead we change the name with which we save it, it will generate a new file with the same unprotected content next to the original file.
Although a priori it seems a bit tedious process, having to unlock, save, unmark or rename the file to achieve our objective, it is really quite fast and will allow us in a few clicks to have our file available with or without password protection.