DotEnv Preview is a Chrome add-on designed to improve the readability of .env files on platforms like GitHub, GitLab, and Bitbucket. This tool offers syntax highlighting, which color-codes keys, values, and comments for better clarity. It groups variables by prefix, making it easier to navigate through configurations, and alerts users to sensitive values that may require attention. With features like placeholder detection and the ability to copy values or entire files with a single click, DotEnv Preview significantly enhances workflow efficiency for developers and DevOps engineers alike.

The add-on prioritizes user privacy by ensuring all formatting occurs locally within the browser, eliminating the need for external server interaction. DotEnv Preview is free to use, with no hidden fees or sign-ups required. Additional functionalities include a toggle for raw and formatted views, line numbering, and compatibility with dark and light themes on GitHub. This makes it an essential tool for anyone dealing with .env files in their projects.