F12 is a free Chrome extension developed by thef12app that aims to make a developer's life a bit easier. It offers a comprehensive set of tools designed to provide convenience and efficiency to developers.

With F12, developers have access to a variety of tools, including a Unix time converter and timezone converter, JWT decoder, Base64 encoder/decoder, URL inspector/constructor, KeyCode finder, and JSON formatter. These tools cover a wide range of functionalities that are commonly used by developers, allowing them to streamline their workflow and save time.

One of the key features of F12 is its commitment to data security. The extension ensures that sensitive data, such as JWT tokens, remains within the user's browser and is not shared with any external website. This provides peace of mind to developers, as they no longer need to worry about the security of their data when using online tools.

The developers of F12 are continuously working on adding more tools to the extension, further expanding its capabilities and usefulness. With its user-friendly interface and focus on data security, F12 is a valuable addition to any developer's toolkit.