How to jailbreak Apple iPhone 4s ios 6.1.3 for free and safe?

I have a iphone 4s ios 6.1.3 and want to jailbreak it. I havent found an absolute download yet so i was wondering if anyone got their iphone to work. Im on verizon and have a windows computer.

I believe, thr s no any software for Iphone 4S 6.1.3…
I m also looking for this software, bt still i dint get tht.
I hope v ll get soon. :(

You will not get it free, i mean every single site offering is asking for a free advertisement fill up ***, I know a beta testing site of evasion where they are offering their jailbreak tool version 1.5.4. I am leaving the website link in source below, give it a try, its safe as i have scanned it.

PS: You must have itunes installed and may be you need to take backup first.