Web development tools are like tools that help you build websites. They can be used to help you design the look of your website, add content to it, and make sure it works correctly. For example, a web development tool could help you create a website from scratch or help you to edit a website that already exists. The tools make it easier to control things like the layout, colours, fonts and other design elements, what type of content can be added and how it looks, how to make links between different parts of the website, and how to make the website work properly.