The JSON Formatter Chrome extension is a useful tool for making JSON easy to read. It formats JSON automatically when loaded in a browser tab, with features such as dark mode, syntax highlighting, collapsible trees, clickable URLs, and buttons for toggling between raw and parsed JSON. It has minimal impact on performance and works on any valid JSON page. Users are advised that it may clash with other extensions that modify the DOM and should disable conflicting extensions if necessary. This extension is open source, privacy-focused, and created by Callum Locke.