Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

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.

share|improve this question
What did you use to remove the password? I was in similar situation except I forgot the permission password I used to protect my PDF's. Tried some of the solutions mentioned here but I couldn't remove the password. Somehow I managed to remove the password and the restrictions only from FEW PDF's by following the tips mentioned in this Wonderhowto guide:… – Sairana Jun 12 at 9:43
up vote 6 down vote accepted

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.

share|improve this answer
The trial version of this worked perfectly - I think I'll be registering ;-) – Alister Feb 17 '10 at 1:12
@Alister - if you work a lot with protected PDFs, it's well worth it :) – Molly7244 Feb 17 '10 at 12:48

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 No Security.

share|improve this answer
The Easy Pdf Password Remover Free only allows for passwords of 3 characters, and you can't specify a password. I couldn't get PDF Password Remover or Unlocker to work - they are both the same tool based on ghostscript or something. – Alister Dec 21 '09 at 23:03
I found that (from the 7 easy ways to unlock a PDF file) works pretty good, however it was sloooooooow. – Alister Feb 24 '10 at 7:58
PDF Unlocker worked like a charm! – Frankie Jul 10 '11 at 23:00

If you have access to a Mac (and, you can try "File", "Print", "Save as PDF" or "File", "Save as" a PDF document.

This has removed the password on some documents for me. I don't know if these tips are applicable to Adobe Reader.

share|improve this answer
Don't have a mac, but thanks. – Alister Jan 5 '10 at 1:01
For Linux users I suggest they do this using Okular rather than Evince. Okular maintained text information in the process, while Evince failed to maintain that, or page orientation. – badp May 6 '12 at 18:11
This doesn't work anymore. – Tyilo Aug 15 '12 at 15:10
@Tyilo It does, for any Mac running 10.7 or earlier. It didn't stop working, you just upgraded to a newer software version since this answer was posted. On Mountain Lion, try Preview's File » Save…, File » Duplicate or File » Export…. – Daniel Beck Aug 15 '12 at 15:13
File > Save, exports the file with all pages blank and the other two options, requires me to type the "owner" password although I only know the "user" password. – Tyilo Aug 15 '12 at 15:19

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

enter image description here

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:

enter image description here

You cannot change security on this document because the document is signed or certified.

enter image description here

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. ] %%
share|improve this answer

MuPDF has a free Windows command line tool called mutool.exe

c:\> mutool clean protected.pdf cleanpdfwithoutpassword.pdf

I personally used it to remove the password on my American Express statement I downloaded so I could merge all my statements into one giant PDF.

share|improve this answer

You must log in to answer this question.

protected by Gnoupi Jul 14 '10 at 7:16

Thank you for your interest in this question. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).

Would you like to answer one of these unanswered questions instead?

Not the answer you're looking for? Browse other questions tagged .