Almost all the PDF files we download from the Internet are password protected from editing, coping, printing, etc. Thus a powerful free PDF Unlocker is indeed necessary tool if we want to unlock PDF password free. Here we list the top 7 free PDF unlocker tools and a powerful alternative PDF Unlocker freeware PDF Password Recovery for your reference.
Top 1. PDFCrack
PDFCrack is one of the most commonly used fee PDF unlocker software. It can recover both the user password and owner password from your password protected PDF files with a brute-force password recovery method.
Pros: Free, remove both user password and owner password
Cons: Password more than 4-digit takes much time. A longer and more complicated PDF password could take days, weeks, or even longer to recover.
OS: Windows 8, Windows 7, Windows Vista, and Windows XP
Top 2: GuaPDF Demo
GuaPDF Demo (also named Guaranteed PDF Decrypter) is primarily used to various restrictions from PDF files, up to 256-bit key encryption, and to decrypt 40-bit key passwords for opening PDF documents.
Pros: Freeware, easy to use
Cons: Password decrypting process takes 1-2 days on one modern desktop computer. GuaPDF only decrypts PDF files at higher levels of version 1.7 if the encryption is at 128-bit AES.
OS: Windows 7, Vista, XP, 2000, and most Windows server operating systems.
Top 3: FreeMyPDF.com
FreeMyPDF.com is a free PDF unlocker online tool. You upload the encrypted PDF file to FreeMyPDF and the restrictions will be decrypted before sending back to you.
Pros: A simple online utility where you can upload a PDF file and quickly remove its restrictions.
Cons: FreeMyPDF.com works for files you are able to view. FreeMyPDF only supports PDFs that you can open and read. PDFs that require a password for viewing cannot be unlocked using this app.
OS: Windows 8, Windows 7, Windows Vista, and Windows XP
Top 4: PDF Password Remover Online
Just as the name says, PDF Password Remover Online is also a free online PDF password remover. It will remove Owner Password and User Password of the PDF documents.
Pros: Simple interface, easy to use
Cons: It removes password but no password is actually discovered. The maximum PDF file you want to decrypt is restricted to 10 MB.
OS: Windows XP, Windows 7, Linux, Mac OS X, IOS or Android.
Top 5: PDF Password Remover
PDF Password Remover is another free PDF unlocker utility. It is a PDF password remover tool for PDF owner password.
Pros: Simple interface, easy to use
Cons: PDF Password Remover only works with PDF files up to version 1.7 level 8 with 128-bit RC4 encryption and doesn't support some of the higher encryption levels.
OS: Windows 10, Windows 8, Windows 7, Windows Vista, and Windows XP
Top 6: PdfCrypt
PdfCrypt is the desktop version of PDF Password Remover Online. It is a windows 32 console/command line version PDF encrypt & decrypt software, supports standard 48 bits, 128 bits, AES-128 bits encryption, and decryption
Pros: It is easy to use. You just need to input and output PDF
Cons: PdfCrypt is a password remover tool that will not find an owner or user password. Some updated PDF files can cause wrong output results.
OS: Windows 7, Windows Vista, Windows XP
Top 7: PDF Unlocker
PDF Unlocker is a Free PDF password remover utility that will find the owner password of a PDF file with a brute-force password recovery method.
Pros: Simple interface, easy to use
Cons: Longer passwords could take PDF Unlocker several days, weeks, or longer to crack.
OS: Windows 7, Windows Vista, and Windows XP
Powerful Alternative PDF Unlocker Freeware
We have introduced 7 commonly used PDF unlocker freeware. Through the description, you will notice that each one has its unavoidable defects. So here I recommend a powerful alternative PDF Unlocker freeware Adobe PDF Password Recovery .
The advantages PDF Password Recovery
- 1. Recover both User password and Open password from encrypted PDF files.
- 2. 3 Powerful password crack methods (Brute-force Attack, Brute-force with Mask Attack, Dictionary Attack) to recovery PDF password with 100% guarantee.
- 3. Easily find PDF password with only 3 steps.
- 4. Supports all PDF versions release to date, including PDF 1.7 (Acrobat 10).
- 5. Work on Windows OS including Windows 8, Windows 7, Windows XP and etc.
Compared to those free PDF Unlocker tools, Adobe Document Password Recovery could be more reliable and flexible. Now you can choose the most suitable PDF password recovery tool to unlock PDF password free for yourself.