JSON Tree Viewer

Explore JSON as a collapsible, typed tree.

Your JSON is parsed locally in your browser to build the tree, and nothing is uploaded to a server.

Need clean, indented output? Try the JSON Formatter.

About JSON Tree Viewer

This online JSON tree viewer turns raw JSON into a collapsible, colour-coded tree so you can explore deeply nested objects and arrays without scrolling through dense text. Paste an API response, config file, or log payload on the left and the tree renders instantly on the right, with each value typed and arrays and objects showing their item or key counts when collapsed. It works as a quick JSON viewer for developers debugging endpoints, QA engineers inspecting fixtures, and anyone trying to understand an unfamiliar JSON structure. Invalid JSON is flagged with its line and column so you can fix syntax errors fast. Because it runs locally in your browser, large or sensitive documents are parsed on your own machine and the data never leaves your device. Use it to explore nested JSON, trace a value's shape, and make sense of complicated payloads at a glance.

Features

How to use the JSON Tree Viewer

  1. Paste or type your JSON into the Input JSON box on the left.
  2. See it render as a typed, colour-coded tree in the Tree panel on the right.
  3. Click any object or array node to expand or collapse that branch.
  4. If the JSON is invalid, read the reported line and column and fix the syntax.

Example

Input

{"user":{"id":7,"roles":["admin","editor"],"active":true}}

Output

object {1}
 └─ user object {3}
     ├─ id: 7
     ├─ roles array [2]
     │   ├─ 0: "admin"
     │   └─ 1: "editor"
     └─ active: true

The object renders as a collapsible tree with each value typed.

Common errors & troubleshooting

Frequently asked questions

What is the JSON Tree Viewer?
It is an online tool that parses your JSON and shows it as a collapsible, typed tree so you can navigate nested objects and arrays without reading raw text. Each value is colour-coded by its type.
How do I explore deeply nested JSON with the JSON Tree Viewer?
Paste your JSON on the left, then click any object or array node in the Tree panel to expand or collapse it. Collapsed branches show their item or key count so you can drill into only the parts you care about.
Can the JSON Tree Viewer handle large or deeply nested JSON?
Yes. It renders big and heavily nested documents, and you can collapse the branches you do not need to keep the view fast and manageable.
Does the JSON Tree Viewer change or save my JSON?
No. The viewer only displays the parsed structure; your original JSON is never modified or stored.
What happens if my JSON is invalid in the JSON Tree Viewer?
The viewer reports the error along with the exact line and column in the text so you can quickly find and fix the syntax problem.
Is my data sent anywhere when I use the JSON Tree Viewer?
No. Your JSON is parsed locally in your browser and never leaves your device, so even sensitive payloads stay on your machine.

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