Searching for and using a "Sims 4 Key Generator" exposes you to three primary and severe dangers:

EA occasionally releases free DLC packs. For example:

Product keys are not random strings of letters and numbers generated by a simple algorithm. Every legitimate EA key is generated securely by EA, stored in their central database, and encrypted. When you redeem a code, the platform verifies it against this database. A third-party website cannot guess or inject a fake code into EA's secure servers. 2. The "Human Verification" Trap