Tuello is a powerful Chrome extension designed for web developers and testers, offering a suite of tools to enhance website interaction and analysis. Key features include the ability to intercept and modify HTTP requests, track HTML elements, and record user actions for playback. Users can export recorded actions as a JavaScript library, making it easy to create demo sites or mockups.

In addition to request interception, Tuello allows for tracking of HTML tags, attributes, and page text, highlighting them in real-time. It also provides functionality to format JSON data, visualize JSON streams as tree structures, and monitor resource consumption on the page. With customizable options like dark mode and language changes, Tuello can be toggled on or off during browsing, offering flexibility for users.