ScratchHighlighter is a free Chrome add-on developed by 39sho that aims to improve the user experience of Scratch input fields. It provides color coding to make it easier to distinguish between numbers and text.

With ScratchHighlighter, input fields in Scratch are highlighted with different colors. Numbers are displayed in green, while text is displayed in red. This simple visual cue makes it much easier to identify and differentiate between numbers and text, enhancing the overall usability of Scratch.

The program is released under the MIT license, allowing users to freely use and modify the source code. ScratchHighlighter falls under the category of browsers and the subcategory of add-ons and tools, making it a valuable addition for Scratch users who want to enhance their coding experience.