A 3D printed keychain with an NFC tag inside is a compact accessory designed to securely hold keys while also offering technological functionality. The keychain is typically created using additive manufacturing techniques, resulting in a custom-designed shape that can vary in size and style. Embedded within the keychain is a small NFC tag, a wireless communication technology that allows for data transfer and interaction with NFC-enabled devices. This technology enables various functions such as accessing electronic locks, transferring information, or triggering specific actions with a simple tap or swipe. Overall, the combination of 3D printing and NFC technology in this keychain provides users with both practical utility and modern innovation in a single device.