GTools: Developer Swiss Army Knife is a free Chrome add-on designed for developers, offering a suite of 20 essential tools directly accessible from the browser toolbar. This add-on operates entirely locally, ensuring that sensitive data like JSON payloads and API responses are kept secure without any network requests or data collection. Key features include a JSON Formatter, JWT Inspector, Regex Tester, and a Diff Viewer, among others, catering to various development needs.

The toolset emphasizes user privacy and simplicity, requiring minimal permissions and no sign-up process. Users can easily generate QR codes, convert between different data formats, and even manage local storage effectively. GTools can be expanded into a full tab for a more spacious interface, providing keyboard shortcuts for efficient navigation. Built by developers for developers, GTools stands out as a robust and user-friendly solution for web development tasks.