Free PDF Unlocker

Free PDF Unlocker is an intuitive application you can use to unlock encrypted PDF files by specifying the correct password, as well as to apply force and try to decrypt the PDFs if you have misplaced or forgotten the secret code. It may help you recover important data instead of deleting the files forever.

Requires .NET Framework to work

To be able to launch this tool, make sure you have .NET Framework installed on your PC, since it cannot work without it. The program's packed in a user-friendly interface made from a single window split into two panes: for unlocking PDFs and for configuring settings.

Enter the password to decrypt PDFs

You can add multiple PDFs to the task list if you want the tool to process all of them as the same time. If you already know the password and only wish to lift it from the protected documents, then you can enter it and tell the tool where you want to save the new, unprotected files.

Use a dictionary or apply brute force

Otherwise, go to the settings tab and choose the decryption mode between dictionary and brute force. In case of dictionary, you can load the existing text document from Free PDF Unlocker's installed directory to try all words, or create a new text file from scratch and enter what you think could be the correct password (one word per line).
If you apply brute force attack, you can set the exact length or minimum and maximum number of characters, as well as choose the type of characters between letters (both upper and lower case), numbers, letters and numbers, or a custom set (just enter the characters you want to randomly combine to find out the secret code). Worth noting is that, when the application successfully decrypts a PDF document, it doesn't reveal the password.

Simple and straightforward PDF decryptor

All things considered, Free PDF Unlocker has easy-to-use understand options for helping you decrypt PDFs by any means necessary to recover sensitive information. The time it takes to finish a task depends on the password's complexity and settings applied.