What tool is commonly used in browsers to aid webpage development?

Browser Developer Tools are an essential suite of utilities integrated into modern web browsers that facilitate the development and debugging of web pages. These tools allow developers to inspect HTML elements, modify CSS styles in real-time, and view the JavaScript console for debugging purposes. Additionally, developers can monitor network activity, analyze performance, and conduct tests for different device viewports, all within the browser environment.

These tools support a range of tasks from checking the layout of a webpage to debugging JavaScript code, making them versatile and invaluable for web development. The combination of features available in Browser Developer Tools, such as inspecting the Document Object Model (DOM), profiling web performance, and evaluating security aspects—all accessible with just a few clicks—enhances a developer's ability to create and troubleshoot web applications effectively.

Other options may refer to tools that have specific purposes or may be less universally recognized and utilized across different browsers, but Browser Developer Tools maintain wide support across all major browsers, making them the most commonly used tool in the context of webpage development.