PDF Password Unlocker

Brief Introduction of PDF Password Unlocker

Load: Click it you can load PDF files which you want to unlock password.

Decrypt: Click it to start to unlock PDF password.

Type of attack:

Brute-force: PDF Password unlocker surporst Brute-force attack.

Dictionary: Additional user dictionaries support, case changes, multiple mistypes and other modifications for each dictionary word.

Key search: Search file key for a 40-bit encryption PDF file, the key length is 40 bits, so the total number of keys is 2^40, or 1,099,511,627,776, the whole recovery process takes about 30 days on PIII-450 computer, and the average is just 15 days.

All Caps Latin(A-Z): If you think there are capital latin letters included in the password, check in front of this option.

All Small Latin(a-z): If you think in the password there will be small latin (a,b,c,d,e,f,g,etc), check in front of it.

All digits(0-9): 0 1 2 3 4 5 6, etc.

All special symbols (!@...): Some times there may be also some special symbols in the password like : `~!@#$%^&*()-_=+\|,./<>?;:'"[]{}.

All printable: If you have no idea of password PDF Password Unlocker requires you to check in front of it.

User defined characters: User defined characters for construct passwords

Minimal password length: Fill in the minimal length of password you think, then PDF Password Unlocker may save a lot of time for you.

Maximal password length: Type the max number of password length, PDF Password Unlocker will try the password whose length between the minimal password length and maximal password length.

Start from: First password to be tried by PDF Password Unlocker.

End at: Last password to be tried by PDF Password Unlocker.

Dictionary file path: Load a dictionary file for dictionary attack.
Try all possible upper/lower case combinations: Construct passwords from dictionary file automatically.