Liberate PDF: Remove Restrictions from PDF files

PDFs may have several restrictions: They can be encrypted with a password; disallowed to print them (why?); disallowed to copy their content (why??); or even disallowed to comment them (why???). If you think that this is unnecessary discomfort, this tool is for you: Upload one or more PDFs, provide a password (if any is set, otherwise leave it blank) and you will be rewarded with usable PDFs.