JSON Viewer Pro
A browser extension that renders JSON responses as readable, navigable data.
Why it exists
Raw JSON in a browser tab is a wall of text. The extension detects JSON content — API responses, .json files — and replaces it with a formatted view, so a payload can be read and navigated instead of scrolled past.
What it does
- Syntax highlighting for JSON structure
- Collapsible sections for nested objects
- Light and dark theme
- API response time and performance metrics
- Export to CSV and YAML
- One-click copy of the whole document
- Configurable colour scheme, font size and performance indicators
Stack
- JavaScript (ES6+)
- HTML5
- Browser extension APIs
Engineering notes
It is packaged as a store-distributed extension rather than a library: it activates automatically on any page that serves JSON and exposes its controls in the toolbar — theme, performance metrics, export, expand and collapse, reload, and copy. Settings for the colour scheme, font size and metric display persist between sessions.
Limitations
- Distributed through the browser extension store rather than a package registry.