CodeCompose is a Chrome add-on designed to enhance the process of sharing code snippets through Gmail. It allows users to easily format code by simply highlighting it in the compose window and inserting a syntax-highlighted block. This tool supports multiple programming languages including JSON, JavaScript, TypeScript, Python, SQL, HTML, and CSS, ensuring that the code is presented clearly and professionally.

One of the standout features of CodeCompose is its auto language detection, which automatically identifies the programming language used in the code. Users can also choose from five built-in themes for code formatting, including Dark, Dracula, Light, GitHub, and Monokai. The live preview functionality allows users to see how their code will appear before inserting it into the email, making it a fully customizable solution for anyone needing to share code snippets.