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.
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.
I tried the Win32
pdfclean binary for MuPDF 0.5: https://web.archive.org/web/20191119070425/https://mupdf.com/downloads/archive/mupdf-0.5-win32.zip
I was able to remove the password without having to know the source password.
pdfclean clean protected.pdf pdfwithnopassword.pdf
MuPDF, available for at least Windows and macOS (via Homebrew) has a free command line tool called
I personally used it to remove the password on my American Express statement and merge all my separate PDF statements into one giant PDF.
The command line is:
mutool clean protected.pdf pdfnopassword.pdf
You can try Easy Pdf Password Remover Free. Other alternatives are:
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
You can use SysTools PDF Unlocker:
- Microsoft Windows
- non-gratis if you don't want the SysTools Watermark or need to process batch of PDF files
It allowed me to remove the security on a password-protected document (for which I knew the password) certified by Adobe EchoSign e-signature service, whereas Adobe Acrobate Pro XI wouldn't let me do it:
You cannot change security on this document because the document is signed or certified.
Trying to print the document also wasn't working:
%%[ ProductName: Distiller ]%% This PostScript file was created from an encrypted PDF file. Redistilling encrypted PDF is not permitted. %%[ Flushing: rest of job (to end-of-file) will be ignored ]%% %%[ Warning: PostScript error. No PDF file produced. ] %%
On GNU/Linux, use the
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.