JSON Tree Viewer
🔒 In your browserExplore JSON as a collapsible tree.
Click any node to expand or collapse. Great for exploring large API responses.
About the JSON Tree Viewer
Large JSON responses are almost impossible to navigate as one flat wall of text. This free JSON tree viewer renders your JSON as an interactive, collapsible tree, so you can expand only the branches you care about and understand the structure of even deeply nested API responses at a glance.
Paste a response from an API, a config file, or a log line, and explore it visually — keys, values and types laid out with their nesting made obvious. It runs entirely in your browser, so nothing you paste is uploaded.
How to use the JSON tree viewer
- Paste your JSON into the input.
- Expand and collapse objects and arrays to focus on the parts you need.
- Read keys, values and types clearly, with nesting shown visually.
- Collapse everything to get a high-level map of the structure, then drill in.
When a tree beats raw text
Formatting (pretty-printing) JSON adds indentation, which helps — but a 2,000-line formatted response is still 2,000 lines to scroll. A tree lets you collapse whole branches you don't care about, so a deeply nested payload becomes a handful of top-level nodes you expand on demand. It's the difference between reading a document and using a table of contents: far faster for finding one field inside a large object, comparing the shape of array items, or understanding an unfamiliar API's response.
Tree viewer vs. formatter vs. JSONPath
These three tools solve different problems. Use the tree viewer to explore and understand a structure you don't know yet. Use the JSON Formatter when you want the whole thing readable as text to copy or diff. And once you know the path to the data you want, the JSONPath Tester lets you extract exactly those values with a query. They work well together: explore with the tree, then query with JSONPath.
Frequently asked questions
What is a JSON tree viewer?
A tool that displays JSON as an expandable tree of nodes instead of raw text, making it far easier to explore nested objects and arrays without scrolling through everything at once.
Can it handle large JSON files?
Yes. Because you can collapse branches you aren't interested in, even very large or deeply nested JSON stays manageable — you only render and read the parts you expand.
How is this different from a JSON formatter?
A formatter pretty-prints the whole document as indented text. A tree viewer lets you collapse and expand sections, which is much faster for navigating large or unfamiliar structures and finding a single field.
Can I see the data type of each value?
Yes. Strings, numbers, booleans, null, objects and arrays are shown distinctly, so you can tell at a glance whether a field is, say, the string "42" or the number 42.
Is my data private?
Yes. The JSON is parsed and rendered locally in your browser and is never sent to any server, so it's safe for real API responses.
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🔗 Embed this tool on your website — free
Copy this and paste it into your page's HTML. The tool runs in the visitor's browser, just like here. Change height to fit, or add the optional auto-resize snippet below. Add ?theme=dark to the URL for dark mode.
<iframe src="https://toolhq.dev/embed/json-tree-viewer/" title="JSON Tree Viewer — ToolsHub" width="100%" height="520" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" loading="lazy"></iframe>Optional: auto-resize the iframe height
Add this once on the same page so the iframe grows to fit the tool:
<script>
addEventListener("message", function (e) {
if (e.data && e.data.type === "toolshub:resize") {
document.querySelectorAll('iframe[src*="/embed/"]').forEach(function (f) {
if (f.contentWindow === e.source) f.style.height = e.data.height + "px";
});
}
});
</script>