Shhh, don’t tell anyone about this tip.
Well alright you can. Frequently I get asked to open up PDF files that have been bought in. In most cases it’s because some educational product has a distracting picture on the bottom or commercial section or simply because the teacher involved only wants the students to see part of the paragraph.
Lots of educational resource makers lock their PDFs, presumably under the assumption that this will prevent theft of materials. And while it does; the truth is, it really just gets in the way.
Recently I was asked to turn a practice exam paper into a flash-based self-marking exam. But the exam board has locked their PDFs. Why? Probably because some amateur web designer given the task thought it would be good. Problem for me was that I can even highlight the text in a locked PDF!
Then I turned to Unlock-pdf.com
This website allows you to upload a protected PDF and save out an non-protected version. Ultimately just another of those tools that makes my life a little bit easier