ChameleonMini is a versatile tool for practical NFC and RFID security analysis compliance and penetration tests and various end-user applications. The freely programmable platform can create perfect clones of various existing commercial smartcards including cryptographic functions and the Unique Identifier (UID). It can be employed to assess security aspects in RFID and NFC environments in different attack scenarios such as replay or relay attacks state restoration attacks sniffing of NFC communication or functional tests of RFID equipment. New firmware for the ChameleonMini can be comfortably uploaded via a USB bootloader. A convenient human-readable command set allows to configure its behavior and update the settings and content of up to eight internally stored virtualized contactless cards. During battery-powered stand-alone operation the integrated buttons and LEDs enable user interaction and feedback.