How to remove a usage restriction from a PDF file?

adobe-acrobatSecurity

I have made usage restrictions to a PDF file and protected it with a password. Now I would like to remove the protection to allow my self to do more with the document. Doing a Google search for "unlock protected pdf with password" gave me all sorts of crazy suggestions using all sorts of cracking/hacking/illegal tools.

So I refined my search and included "adobe support" and found the following page.

Removing Security from PDFs: Individually and in Batch

This is where my problems would have ended but my version of Adobe Acrobat doesn't match the version used in the description. Also, my Security tab of the Document Properties dialog box (i.e. security properties) does not have the security options as shown in the example.

This is their:

their

And this is mine:

mine

So how do I do this? Do I really have to hire a hacker for a day? Just to perform this simple task of unlocking the restrictions of my own document? I mean I know the password… hell, I thought Adobe software would be smarter than this.

I previously had the older version of Adobe Acrobat as the one shown in the example (see screenshot and link above) and I know that it was possible to remove this restriction very easily. There was even a dedicated button for this on the toolbar.

This is the Security button in old Adobe Acrobat:

security button

For the record, I have Adobe Acrobat X Pro.

Best Answer

Try QPDF

I did not want to upload my PDF to a dodgy site and wait in queue, so instead I spend some time googling. I found this free open source utility called qpdf.

I ran it on the file like this:

qpdf --decrypt input.pdf output.pdf

And the restrictions were removed. Note that the original PDF was not password protected.

Further reading