JSON Tree Viewer - Visualize JSON Data Interactively Online
Visualize JSON as an interactive tree structure. Expand, collapse, search nodes, and copy JSON paths — 100% client-side, no data sent to server.
Frequently Asked Questions
What is a JSON Tree Viewer?
A JSON Tree Viewer is an online tool that parses JSON data and displays it as an interactive, hierarchical tree structure. Instead of reading raw text with brackets and braces, you can visually explore nested objects and arrays by expanding and collapsing nodes. Each data type is color-coded for instant recognition.
How do I use this JSON Tree Viewer?
Paste your JSON data into the input area on the left (or upload a .json file). The tree view renders automatically on the right. Click the triangle icons to expand or collapse nodes, use the depth buttons (1, 2, 3, All) to control tree depth, and use the search bar to find specific keys or values.
Is my data safe? Does anything get sent to a server?
All JSON parsing and tree visualization is performed 100% client-side in your browser using native JSON.parse(). No data is transmitted to any server, stored in any database, or logged anywhere. This tool is safe for use with sensitive API responses, production data, and confidential configurations.
What is JSONPath and how does path copying work?
JSONPath is a query language for JSON, similar to XPath for XML. It provides a way to reference specific elements within a JSON structure (e.g., $.data.users[0].name). Click any node in the tree to see its full JSONPath in the breadcrumb bar, and copy it with one click.
What is the maximum JSON size this tool can handle?
This tool can process JSON files up to 5MB. For files under 1MB, parsing is nearly instant. The tree view supports large structures with smooth scrolling. Use the depth buttons to start with a collapsed view and only expand sections you need.
How is this different from the JSON Formatter tool?
JSON Formatter focuses on text manipulation — formatting, beautifying, and minifying raw JSON text. JSON Tree Viewer focuses on visual exploration — rendering JSON as an interactive tree with expand/collapse, search, path copying, and node inspection. They are complementary tools.
Can I search for specific keys or values?
Yes. The search bar searches both keys and values simultaneously. Matching nodes are highlighted, parent nodes auto-expand to reveal matches, and a match counter shows results (e.g., '3 of 12'). Navigate between matches with the Previous/Next buttons.
What JSON data types are supported?
All standard JSON data types: strings (green), numbers (orange), booleans (purple), null (gray italic), objects (expandable with key count), and arrays (expandable with item count). Each type has distinct color coding for visual recognition.
Code Examples
// Build a tree from JSON and search it
function buildJsonTree(data, key = '$', path = '$', depth = 0) {
const node = { key, path, depth, type: getType(data) };
if (data === null) { node.value = null; return node; }
if (Array.isArray(data)) {
node.children = data.map((item, i) =>
buildJsonTree(item, `[${i}]`, `${path}[${i}]`, depth + 1));
return node;
}
if (typeof data === 'object') {
node.children = Object.entries(data).map(([k, v]) =>
buildJsonTree(v, k, `${path}.${k}`, depth + 1));
return node;
}
node.value = data;
return node;
}
function getType(v) {
if (v === null) return 'null';
if (Array.isArray(v)) return 'array';
return typeof v;
}
const json = { name: 'John', tags: ['dev', 'js'] };
const tree = buildJsonTree(json);
console.log(JSON.stringify(tree, null, 2));