CF JSON Lens

CF JSON Lens turns raw JSON in your browser into a clean, readable, collapsible tree, automatically, the moment a page loads. Open any API response, JSON file, or endpoint and instead of a wall of text you get syntax highlighting, line numbers, fold and unfold on every node, and a one-click toggle back to the raw source. Choose from 27 color themes on the options page, including dark modes. Type "json" in the address bar to format any pasted JSON. Works on application/json responses and on JSON served as plain text (many APIs do this). No account, no network calls, no analytics. Everything runs locally in your browser and your data never leaves the page. CF JSON Lens is a maintained, Manifest V3 fork of the open-source JSON Viewer extension by Tulio Ornelas (MIT), which is no longer available. Rebuilt with a modern toolchain and kept free by CF Soft. Works on Chromebooks and ChromeOS, where extensions are the only option for viewing JSON. Source code: https://github.com/cfgenius145-sketch/cf-json-lens