JSON Viewer
Extension Actions
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