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From Free PDF Solutions:
Free PDF Unlocker is your solution for unlocking password protected pdf files. Ever forget your password on a pdf file that you absolutely need to get into? Run this free easy to use PDF Unlocker which tries various methods to crack into your document. This program uses the bruteforce and Dictionary method.
Installs TONNES of crapware, took longer to uninstall than install. Plus the actual PDF unlocking program is unbelievably crap, it starts with A through to Z, then does a through to z, then Aa through to Az and so on. It literally tries every single possibility, at about 2 per second. There are billions of possibilities!
I'm such a lucky guy when found this app while in stuck with my locked document. I've tried many pieces of crap and this is my luck. Setting up was really fast, some ads pop up but I could deny, anyway people get something through add then it wouldn't hurt me. I can go with that. It did work very well which reached my expectation. I'm happy to have this app