Live CSS Tester is a Chrome add-on developed by Brandon Fowler. This free tool is designed to make it easy to inject CSS into a webpage for testing purposes. Whether you're a web developer or just someone who wants to experiment with customizing the appearance of a webpage, Live CSS Tester provides a convenient solution.

With Live CSS Tester, you can enable or disable CSS on a webpage with just a click. This allows you to instantly see the impact of your CSS changes without having to modify the actual code of the website. You can also download CSS files from a webpage, making it easy to inspect and analyze the existing styles. Additionally, Live CSS Tester allows you to upload your own CSS files, giving you full control over the appearance of the webpage.

The add-on offers a dark mode, which can be easier on the eyes during long testing sessions. It also supports word wrap, making it easier to read and edit longer lines of CSS code. The autocomplete feature helps speed up your workflow by suggesting CSS properties and values as you type.

One of the standout features of Live CSS Tester is its devtools support. You can access the CSS editor through a popup or directly in the Chrome Developer Tools. This flexibility allows you to seamlessly integrate Live CSS Tester into your existing web development workflow.

Another useful feature is the ability to remember your last input. This means that even if you close the add-on or refresh the webpage, your previously entered CSS will be saved and automatically applied when you return.

Overall, Live CSS Tester is a valuable tool for web developers and anyone who wants to experiment with CSS on webpages. Its intuitive interface, convenient features, and seamless integration with Chrome make it a must-have for anyone working with CSS.