How to jailbreak iphone 5 with iOS 7.0.4?

I tried envasi0n & it didn't work. & I don't wanna pay someone if I can just do it my self. So what's a free & safe way to jailbreak it.

Most likely your not going to find a safe/free way to do it, and it may just cause a headache in the long run.

Envasion7, just google it

Evasi0n7 should work. I jailbreak my iPod Touch a few days ago. And my friends successfully use it to jailbreak iPhone as well.

You may refer to the following tutorial to have a try.
http://www.syncios.com/blog/how-to-jailbreak-ios-7-using-evasi0n7-on-ipad-iphone-and-ipod-touch-5g/