Removing the password from a PDF file

Removing the password from a PDF file I have a couple of ebooks as PDFs with passwords, however my ebook reader (sony prs600) doesn't seem to support PDFs with passwords. What is the easiest of removing the password from a PDF (I know the password, which presumably helps a lot). It's a bit annoying buying a book and then only being able to read it in front of a computer.
Asked by: Guest \| Views: 305

Total answers/comments: 3

Comments display order:

Guest [Entry]

"With A-PDF Restrictions Remover, you can remove the password and other restrictions in a few seconds.

A-PDF Restrictions Remover is shareware ($10), try before you buy."

Guest [Entry]

"You can try Easy Pdf Password Remover Free. Other alternatives are:

PDF Password Remover (freeware)
PDF Unlocker (freeware)

If none of the above worked for you, have a look at this page: 7 easy ways to unlock a PDF file.

NOTE: If you have Adobe Acrobat (not the free Acrobat Reader), you can remove the passwords from File > Document Security > Security Options by selecting No Security."

Guest [Entry]

"On GNU/Linux, use the qpdf utility:
qpdf --password=YOUR_PASSWORD_HERE --decrypt your_input.pdf your_output.pdf

this is also easy to automate with a shell script to decrypt multiple PDF files.
qpdf is available as a package on many/most GNU/Linux distributions. For example, on Debian/Ubuntu-based distributions, you would get it by running:
sudo apt install qpdf

Caveat: If you specify your password on the command-line, your shell may place it, as plain-text, in your command history file."