JSON

JSON Viewer

Paste JSON and explore it as a collapsible tree — objects, arrays, and values update as you type.

Parsing and rendering happen locally in your browser. Nothing is uploaded, logged, or stored.

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Paste JSON here — the tree view updates as you type...
Tree appears here

How to use

  1. Paste your JSON into the left panel — the tree view builds instantly as you type.
  2. Click any object or array header to collapse or expand it.
  3. Use the tree to locate deeply nested fields without scrolling through raw text.

Why use a tree viewer?

Raw JSON becomes unreadable past a few levels of nesting. A tree view gives you structural navigation: each object shows its key count, each array its length, and you can fold away the branches you don't care about. Strings, numbers, booleans, and nulls are color-coded so types are visible at a glance.

The viewer re-parses on every keystroke and reports syntax errors immediately, so it doubles as a quick validity check. For heavier editing use the JSON Editor, for formatting use the JSON Formatter, and if your payload is an XML response instead, try the XML Viewer.

Examples

Inspect API responses

Paste a large API response and drill down to the exact nested field you need instead of hunting through text.

Understand fixtures

Open a mock-data fixture and fold the repeated array items to see its overall shape in seconds.

Frequently Asked Questions

Is my data uploaded anywhere?+
No. The JSON is parsed and rendered entirely in your browser — the page works offline once loaded.
How are types displayed?+
Strings are green, numbers blue, booleans purple, and null grey — so you can spot a stringified number like "42" immediately.
Can it handle large documents?+
Yes. Deep branches are collapsed by default, so even multi-megabyte responses stay navigable. Only two levels are expanded initially.
What if the JSON is invalid?+
The parse error appears in the tree panel as you type. Fix it with the JSON Formatter & Validator and paste again.

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