In Adobe Acrobat DC, open the PDF > Enter the password > OK > File > Properties > Security > Security Method > No Security > OK > OK.
How to Use a PDF Viewer To Remove Password Protection From a PDF
For legal reasons, you should only ever remove password protection from a PDF that you possess and know its password. Passwords are typically added to prevent plagiarism or to encrypt the information so that it’s safer to transmit online.
How to Use Adobe Acrobat DC to Remove PDF Password Protection
While Adobe Acrobat Reader is a free PDF viewer for all, Adobe Acrobat DC is a paid app that offers enhanced features for users that regularly need to manipulate PDFs. It’s also considered the more appropriate way of removing the security on a PDF.
What If You’ve Forgotten the PDF Password?
If you’ve forgotten the password to one of your PDFs, it can be trickier to remove the password protection. There are numerous free PDF password remover tools that you can try. There’s no guarantee they’ll work as it depends on the security level of the PDF and other restrictions, but it’s definitely worth trying.