JSON Tree Viewer
Show JSON data as a collapsible/expandable tree structure.
Category: Dev Tools
When to use?
Use it to grasp the structure of deeply nested JSON, to expand only specific parts of large JSON, or to explore an API response's data structure.
How to use
- Paste JSON data into the input.
- Click key names to collapse or expand children.
- Grasp the structure at a glance by type-colored values.
Input Explanation
Enter valid JSON. Objects, arrays, strings, numbers, booleans, and null are all supported.
Calculation Basis
It parses the JSON and renders objects and arrays as collapsible tree nodes, applying different colors per value type (string, number, boolean, null).
Usage Examples
- Grasp JSON structure - View the full structure of deeply nested JSON as a tree.
- Explore API responses - Expand only needed parts of a large API response.
- Validate data - Check that value types and hierarchy are as intended.
Examples
- Click a nested object to expand it step by step
- Preview array item counts and object key counts while collapsed
Cautions
- Generated output is for reference; test carefully before production use.
- JSON parsing runs only in the browser.
Guides
Tree viewer vs. formatter
The JSON formatter shows indented text; the tree viewer suits exploring large JSON structure by collapse/expand.
Value type colors
Strings, numbers, booleans, and null are shown in different colors to grasp the data structure and types at a glance.
FAQ
How is it different from the JSON formatter?
The formatter shows indented text; the tree viewer suits exploring structure by collapse/expand.
Can I distinguish value types?
Yes. Strings, numbers, booleans, and null are shown in different colors.
Can it handle large JSON?
Yes. Deep levels start collapsed so you can expand only what you need.
What if there is a syntax error?
A malformed JSON shows a message pointing out the error location.
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