The fastest way to earn Robux for free is to create a popular Roblox Game. Easier said than done, we know, but if your game is a hit, you can make way more Robux than you could through the other methods.
Fortunately, Roblox comes with a robust game development tool that allows you to create some surprisingly complex games within Roblox. You don’t even need to know how to code to get started — some of the most popular Roblox Games are obbys (obstacle courses). There’s also a ton of great tutorials on YouTube that will help you get started making games in Roblox. If you want to get into the more advanced stuff, you can also find lots of excellent resources for learning Roblox’s scripting language on the web.