📖 What is JSON Tree Viewer?
JSON Tree Viewer renders JSON data as an interactive, collapsible tree structure. Each object and array becomes a node you can expand or collapse, making it easy to navigate deeply nested JSON. Use it to explore API responses, understand complex data structures, or find specific values in large JSON files. Everything runs in your browser.
💡 Example
Input
{"users":[{"name":"Alice","roles":["admin"]},{"name":"Bob","roles":["dev"]}]}
Output
Interactive tree: ▼ users (2 items) → ▼ [0] → name: "Alice", ▼ roles → "admin" ...
🛠️ Common Use Cases
- Exploring large API response structures visually
- Navigating deeply nested JSON without getting lost in brackets
- Finding specific values or keys in complex JSON
- Understanding unfamiliar JSON data structures
- Debugging JSON formatting issues visually
📝 Tree Features
- Expand/Collapse — click any node to expand or collapse its children
- Type indicators — objects, arrays, strings, numbers and booleans are visually distinguished
- Array indexing — array elements show their index position
- Value preview — leaf values are displayed inline next to their keys
⚠️ Common Mistakes
- Invalid JSON — the tree viewer requires valid JSON. Use the JSON Validator first to fix syntax errors.
- Very large files — JSON files over 5MB may be slow to render as a tree. Collapse sections you are not inspecting.
- Confusing objects and arrays — objects use
{} and have named keys; arrays use [] and have numeric indices
❓ Frequently Asked Questions
Can I search for a key in the tree? ▾
Use your browser's Ctrl+F find feature to search for key names or values in the rendered tree.
How deep can the nesting go? ▾
There is no depth limit. Very deeply nested structures render correctly, though you may need to expand multiple levels to reach inner nodes.
Can I edit JSON in the tree view? ▾
This is a read-only viewer. Edit your JSON in the text input, and the tree updates automatically.
Is my data private? ▾
Yes — all processing runs entirely in your browser. Your data is never sent to any server.
Is this tool free? ▾
Completely free — no login, no usage limits, works offline once loaded.
Yes — completely free, no login required, no usage limits.
Is my data private? ▾
Yes — all processing runs in your browser. Your data is never sent to any server.
Does it work offline? ▾
Yes — once the page is loaded, the tool works without an internet connection.