How can i create my own hiP hop/ rap music for free online?

You have many options to choose from. The thing is though if you want to it for free you will have to dedicate more time to your craft. There's all types of cool techniques that you can learn and apply to your own style of music. There is a lot of software that you can get. Some you can find on forums and some you can find commercially. To avoid any hassle or disappointment it's best to purchase the software and any related equipment. FL Studio is a great place to start. There also many producers online with a lot of instrumentals to ready to go. Some that have yet to be touched. Plus there are many tutorials online popping everyday on youtube and all over the web. Tutorials range from beat making to mixing to mastering. It all comes down the time or money your willing to invest to get where you need to be. You can easily google what you need and your bound to find some useful information that you did not know every time you look.