JSON Explorer
Explore JSON as an interactive tree view with search, JSONPath copy, and virtual scrolling for large payloads
Paste valid JSON to visualize as an interactive tree. Supports objects, arrays, and nested structures.
What is the JSON Explorer?
The JSON Explorer visualizes JSON data as an interactive collapsible tree. Instead of reading raw text, you can expand and collapse nodes, search by key or value, copy JSONPath expressions, and see structural metadata like type, child count, and size — making it easy to navigate even deeply nested or large JSON payloads.
How to Use
- Paste your JSON content in the input area
- The tree view renders automatically with the first two levels expanded
- Click any node to expand or collapse it
- Use the search box to find specific keys or values
- Click the copy icon next to a node to copy its JSONPath
- For large payloads, virtual scrolling keeps the UI responsive
Use Cases
- API debugging — Explore API response bodies to understand their structure
- Configuration inspection — Navigate large config files (package.json, tsconfig, etc.)
- Data analysis — Find specific values in complex nested data
- JSONPath extraction — Copy exact paths for use in code or queries
- Log parsing — Explore structured log entries from cloud services
Example: Exploring an API Response
Given a typical REST API response with pagination metadata and nested user objects:
{
"data": {
"users": [
{ "id": 1, "name": "Alice", "roles": ["admin", "editor"] },
{ "id": 2, "name": "Bob", "roles": ["viewer"] }
],
"pagination": { "page": 1, "total": 42, "perPage": 10 }
},
"status": "success"
}
The tree view shows the root Object with 2 keys, data expandable with
nested users array and pagination object, and status as a String leaf.
Searching "admin" highlights the roles array containing it, with the JSONPath
$.data.users[0].roles[0] available for copy.
Virtual Scrolling for Large Payloads
When your JSON contains more than 1000 nodes, virtual scrolling activates automatically. Only visible nodes are rendered in the DOM, keeping the browser responsive even with 50,000+ nodes. Processing for inputs over 100KB is offloaded to a Web Worker so the UI thread stays free.
Privacy and Security
All parsing and tree building happens entirely in your browser using JavaScript. Your JSON content is never transmitted to any server. No data is stored, logged, or shared.
Frequently Asked Questions
What does the JSON Explorer do?
The JSON Explorer parses your JSON input and displays it as a collapsible tree view. You can expand and collapse nodes, search by key or value, filter by path, copy JSONPath expressions, and see each node's type and size. For large payloads it uses virtual scrolling to stay responsive.
How does search work?
Type in the search box to filter by key name or value. The tree automatically expands paths to matching nodes so you can see results in context. Matching is case-insensitive and checks both object keys and primitive values (strings, numbers, booleans).
What is JSONPath and how do I copy it?
JSONPath is a notation for identifying specific elements in a JSON document, similar to file paths. For example, $.users[0].name refers to the name field of the first user in a users array. Click the copy icon next to any node to copy its JSONPath to your clipboard.
What does path filtering do?
Path filtering lets you focus on a specific section of the JSON by entering a JSONPath prefix. For example, entering $.config will expand and highlight only nodes under the config key, collapsing everything else.
What happens with very large JSON files?
For payloads with more than 1000 nodes, virtual scrolling is enabled automatically — only visible nodes are rendered in the DOM. For inputs exceeding 100KB, processing is offloaded to a Web Worker so the UI stays responsive. The tool warns at 500KB and rejects inputs over 5MB.
What node information is displayed?
Each node shows its type (Object, Array, String, Number, Boolean, or Null), the number of children for objects and arrays, and the serialized size of the subtree. This helps you quickly identify large sections of your JSON.
Is my JSON data sent to a server?
No. All parsing and tree building happens entirely in your browser using JavaScript. Your JSON content is never transmitted to any server. No data is stored, logged, or shared.
Can I explore nested JSON strings?
The JSON Explorer displays the tree exactly as parsed. If a value is a string containing JSON (a common pattern in logs or API responses), it will appear as a string node. You can copy the value and paste it as a new input to explore the nested structure.
What is the difference between JSON Explorer and JSON Formatter?
JSON Formatter reformats JSON text with proper indentation for readability. JSON Explorer provides an interactive tree view with navigation, search, filtering, and structural metadata — designed for understanding and navigating complex JSON structures rather than reformatting them.