Do this to remove "owner" passwords (if no "user" password is set): Install qpdf. If on Ubuntu/Debian, you can use sudo apt-get install qpdf. Once qpdf is installed use the following command: qpdf - …

The downloaded file requires a password to open it, but if you need to open it in a normal viewing application, you can also remove the password: adept_remove file.pdf

Password protection operates on a file-level in a .zip archive, so each file can be protected or not by choice. zipinfo will show password protected files by displaying a capital letter in the file type e.g. B …

I would like to share a PDF file on a forum anonymously. When I right click on file and go to 'Details' tab, it shows my computer name and owner name. How do I remove (hide) this information?

4 FOSS-wise, there is PDFCrack, not sure if it does actually remove the security though, it's just a password cracker. I generally turn to some free trial software, A-PDF Restrictions Remover, it's …

4 I have several PDF files each with the same password that I know. What tool or method could batch unlock them and provide a copy of each of the PDFs as an unlocked version? There's CutePDF - …

0 I have PDF file I scanned. I am unable to change the security setting to add password it it. Here is link how to password protect it and also the screenshot for the gray'ed out security propety. I have …

It appears that Word's password protection is not really good, at least until Office 2003, if I read this SU entry correctly. I'm under the impression that Acrobat's PDF password protection should be

There's a command-line tool called qpdf that can remove the password encryption from your PDF files, even in cases where Preview won't let you save a copy of or export the PDF. Installing with …

Aug 22, 2010 · To my surprise, it handles password-protected PDFs well and, when exporting the document, removes the password protection without increasing the file-size. In fact, the file-size …