Shadertoy Highlighter is a free Chrome extension developed by Markus that aims to enhance your experience while using the Shadertoy editor. As an add-on in the Browsers category, this tool allows you to highlight selected text in the Shadertoy editor, making it easier to identify variables with the same name.

With Shadertoy Highlighter, you can simply click on variables and instantly see other variables of the same name highlighted. This feature greatly improves the visibility and readability of your code, helping you identify and manage variables more efficiently. Additionally, the extension provides the option to hover over variables to view their definitions, providing further context and aiding in your coding process.

To access the features of Shadertoy Highlighter, you can conveniently use the context menu by right-clicking with your mouse and selecting "Shadertoy highlighter". This allows you to toggle the extension on and off, giving you control over when you want the highlighting and hover features to be active.

Overall, Shadertoy Highlighter is a valuable add-on for Shadertoy users, providing an enhanced coding experience with its highlighting and hover features. It is a practical tool for developers and enthusiasts who want to improve their Shadertoy workflow and make their code more manageable.