JSONLens

A minimalist extension for easy JSON viewing in the browser

JSONLens transforms raw JSON into a clean, readable format instantly. When you open a URL that returns JSON data, JSONLens automatically detects and formats it with proper indentation, syntax highlighting, and a collapsible tree structure. Features Automatic formatting with customizable indentation Syntax highlighting for keys, strings, numbers, booleans, and null values Collapsible nodes to expand or collapse objects and arrays Search functionality to find data quickly with highlighted matches Copy path or value with a single click Download formatted JSON as a file Light and dark themes with system preference detection Line numbers for easy reference Error detection with clear messages for invalid JSON Keyboard shortcuts for power users How it works JSONLens detects JSON content by checking the Content-Type header or analyzing the page content. Once detected, it replaces the raw text with a beautifully formatted interactive view. Privacy focused No data collection No external requests Works entirely offline No account required Perfect for developers, API testers, and anyone who works with JSON data regularly. Make your JSON readable in one click.