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.
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What did you finally 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 guide: techbii.com/remove-pdf-password-restriction– SairanaCommented Feb 21, 2017 at 12:15
7 Answers
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.
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The trial version of this worked perfectly - I think I'll be registering ;-)– AlisterCommented Feb 17, 2010 at 1:12
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@Alister - if you work a lot with protected PDFs, it's well worth it :)– Molly7244Commented Feb 17, 2010 at 12:48
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4
I tried the Win32 pdfclean
binary for MuPDF 0.6: https://mupdf.com/downloads/archive/mupdf-0.6-windows.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 Linux, Windows and macOS (via Homebrew) has a free command line tool collection replacing pdfclean called mutool
.
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*
Current 1.24+ releases are at https://mupdf.com/releases
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2I found this the easiest. You don't need to install anything. No trial version. No nagging to buy something. It just works. Commented Dec 27, 2017 at 20:40
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3In 2017 this is an excellent free option.
mupdf
is available for OSX users via Homebrew as well. Commented Jan 22, 2018 at 15:14 -
3This didn't work for me on the latest (1.14.0) version of mutool, the output file was still password protected. I then tried with an earlier version (1.3) and it stripped the password out, but I had to supply the password for the original. So ended up with
mutool.exe clean -p "myPassword" protected.pdf
I found 1.3 here– MattCommented Nov 7, 2018 at 9:30 -
5As of version 1.15.0 (which can be downloaded from here), password protection can be removed (assuming the password is available) with:
mutool clean -p "myPassword" -D protected.pdf pdfnopassword.pdf
. The-D
flag is not currently documented, but was added in commit 60b13ad. @Matt Commented May 23, 2019 at 15:36 -
2its a false positive. many av will flag bypass tools as virus even if they are not. up to you if you want to use or not. do what makes you comfortable.– SunCommented Apr 4, 2023 at 23:29
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
.
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1The 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.– AlisterCommented Dec 21, 2009 at 23:03
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1I found that pdfunlock.com (from the 7 easy ways to unlock a PDF file) works pretty good, however it was sloooooooow.– AlisterCommented Feb 24, 2010 at 7:58
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After a lot of searching, this one worked me. blog.rubypdf.com/pdfcrack Commented Apr 12, 2019 at 10:30
You can use the qpdf
utility, like so: :
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
It is also available for Windows; you can download an installer of the latest release (from GitHub).
Security note: If you specify your password on the command-line, your shell may place it, as plain-text, in your command history file.
If you have access to a Mac (and Preview.app), 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.
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1For 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.– badpCommented May 6, 2012 at 18:11
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@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 ♦Commented Aug 15, 2012 at 15:13
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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.– TyiloCommented Aug 15, 2012 at 15:19
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@Tyilo Please note that the question states the password (presumably owner password) is known. You don't know it, so this question — and therefore my answer — just don't apply to your situation.– Daniel Beck ♦Commented Aug 15, 2012 at 16:33
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. ] %%
Tested today with mupdf 1.21.0:
mutool -D -p "PASSWORD" protected.pdf unprotected.pdf
According to the documentation:
-D
Save file without encryption.