JSON Viewer

The most beautiful and customizable JSON/JSONP highlighter that your eyes have ever seen

JSON Viewer highlights JSON and JSONP content directly in your browser. When you open a URL that returns JSON, the extension automatically formats and syntax-highlights it. This is a maintained fork of the original JSON Viewer by Tulio Ornelas, updated to work with modern browsers (Manifest V3). Features: - Syntax highlighting with 27 built-in themes - Collapsible/foldable nodes - Clickable URLs within JSON values - Line numbers - Search within JSON content - Sort keys alphabetically - Works with JSONP responses - Handles numbers larger than Number.MAX_VALUE - Customizable tab size, themes, and CSS - Omnibox integration: type "json-viewer" in the address bar to format JSON or open a scratch pad - Configurable max file size for highlighting The extension only activates when it detects JSON content. It does not collect any data. Source code: https://github.com/rxliuli/json-viewer Original project: https://github.com/tulios/json-viewer