I am sorry, but nothing is for free.
A lot of scammers create “code generators” and other things to pretend that they can give you free stuff. But all they want is to scam you. This site could have been another scam website in the results of Google, Bing and co.
I want to tell you that nothing is for free and if someone claims they give you free stuff – you should be extra cautious.
You wasted some minutes of your life on my site, but it could have been so much worse than that if this site would be a real scam site.
I am, again, sorry that I can not give you Robux for real but I showed you that free Robux is a scam.