If you want Robux without paying, you must use official, safe channels:
Videos often show players entering "secret codes" in games like Mansion of Wonder or Island of Move . While these games have legitimate codes for avatar items, there are no codes that grant Robux. Legitimate Ways to Earn Robux
Occasionally, Roblox will send you a message offering a Robux refund if an item you previously purchased was deleted from the platform. Free Robux or Subscription Generators - Roblox Support
Fake login pages or "generators" ask for your password or "cookies." Once provided, scammers take over your account and steal your existing items and currency.