It is advised to specify the best range into which the password may lie and if possible, provide the exact length. The characters can also be filtered to use only letters, use only numbers, use numbers and letters, or use custom character set. You can specify password length range or exact password length.

You can also add your own words to the dictionary. You can also set the option to try passwords from a Dictionary that is saved in TXT format. It makes use of Brute Force Method to find password of PDF. Free PDF Unlockerįree PDF Unlocker is a free software to unlock PDF. An unlocked PDF file is created at a specified location.Īlso check out the list of best free Software To Password Protect PDF, Password Generator Software For Windows, and Password Manager Software. You can also choose which characters are to be included while scanning from a defined set. It can perform both Brute-Force attack and Dictionary attack to unlock PDF files. It is due to the fact that it is quite simple and effective while you unlock PDF. Also there is no limitation on the number of characters that are to be scanned to crack password of PDF file. Out of these software to unlock PDF, I like Free PDF Unlocker the most.

More complex the PDF password is, more time is taken to unlock PDF. Different options can be set for attack, like: characters and numbers to be included, password length to be scanned, etc. There are various methods in attack that can be deployed, like: simple method, complex method, and hybrid method. These software provide different options to unlock PDF files, like: Brute Force Attack, Dictionary Attack, Network Search, Mask Attack, and Key Search attack options. You can also create a new unlocked PDF from an existing password protected PDF, which will be the copy of the locked PDF without restrictions, even if you do not know the password. These software let you perform these actions even when the owner password is set and you forget the password. Some software also let you bypass the functions of owner password of PDF, like: deny copy text, extract text, extract images, and print PDF. Some of these software display the PDF password, which can be saved for later use, and some of them simply unlock PDF files for you without any restrictions. Using these PDF unlocker software, you can unlock PDF user password and master password. Here is a list of best free software to unlock PDF.

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