Here is the complete process through which a player can redeem the Fortnite Codes for free to get extra rewards of skins, outfits, and emotes.
Click the Fortnite Redemption Code Official Page.
Go to the Login Page of Fortnite account.
Copy the latest active/working code.
Paste the code in redeem code option
Click the redeem code after pasting it.
Always check and confirm to use the relevant code, which you are going to use. You may confirm your resources after redeeming an active status code. If you do not get any extra reward, that means that the code was expired.