ToolBox is a Chrome extension that provides a variety of useful tools, including timestamp conversion, URL encoding, BASE64 encoding, encryption and decryption, QR code generation, IP address and DNS/Whois lookup, JSON parsing, translation, calendar, and color lookup. With the latest version 3.2.x, new features like ElementUI and LayUI icon lookup, currency exchange rates, and code conversion have been added. The extension also allows users to customize the tools they want to display.