How do you use codes to get free diamonds on Animal Jam?

During login, a checkbox on Animal Jam lets you indicate you have a code to enter. Check the box, enter the promo code in the designated field, and log in as usual. A gift box appears with your promo gift inside. Click on the gift box to claim your diamond.

Promo codes for Animal Jam can be found on Animal Jam boards and in external player forums. Enter codes carefully. Spelling must be correct, and the codes are case sensitive. Any code entered that does not match exactly is not accepted by the system. Each code can only be used once per account. Because codes expire quickly, they should be used immediately.