Developer
Free JSON Tree Viewer
Visualize JSON data as an interactive collapsible tree.
About this tool
Reading raw JSON - especially deeply nested API responses - is painful. This tool takes your JSON and renders it as a visual graph with connected nodes, similar to a mind map. Each object and array becomes a clickable node that you can expand and collapse to explore the data structure.
Different node types are color-coded: objects appear with orange borders, arrays with blue, and leaf values with green. Inline properties (strings, numbers, booleans) are displayed directly inside the parent node card, while nested objects and arrays branch out as separate connected nodes.
This is particularly useful when you are debugging API responses, inspecting configuration files, or trying to understand the structure of unfamiliar data. Instead of squinting at indented text, you get a visual hierarchy with connecting lines that make relationships between data immediately clear.
Paste your JSON, hit "Visualize," and the graph renders instantly. Everything runs in your browser - no data is sent to any server. For JSON with syntax errors, the tool shows a clear error message pointing to where the parsing failed.
Frequently Asked Questions
The tool will show a clear error message with details about where the parsing failed. Fix the issue in your JSON and try again.
Yes, but extremely large files (several MB) may cause the browser to slow down since the graph is rendered entirely in the DOM. For typical API responses and config files, performance is not an issue.
Orange nodes are objects, blue nodes are arrays, and green nodes are leaf values (strings, numbers, booleans). This makes it easy to identify data types at a glance.
No. All parsing and rendering happens locally in your browser. Your data never leaves your device.