JSON Tree Viewer

View JSON as an interactive tree. A browser-based developer tool that runs entirely client-side — no data is sent to our servers, no account required.

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What it does

The JSON Tree Viewer is designed for developers who need to view json as an interactive tree quickly and accurately, without setting up local tools or depending on third-party services.

Whether you're working in data inspection or integrating it into a broader development pipeline, this tool saves time and reduces the risk of manual errors. All processing runs in your browser — your data never leaves your machine.

► Debugging API responses and nested data payloads
► Formatting JSON for readability in code reviews and documentation

Key features

✓Collapsible tree with expand/collapse all
✓Key path display on hover
✓Array length and object key count badges
✓Copy subtree as JSON
✓Search/filter nodes by key or value

Example

Expand nested JSON

Input

{"user":{"id":1,"name":"Alice","roles":["admin","user"]}}

Output

object (1 key)
  user: object (3 keys)
    id: 1
    name: "Alice"
    roles: array [2]
      0: "admin"
      1: "user"

How to use it

Open JSON Tree Viewer by clicking on it in the Dev-Belt dashboard.
Enter your input in the provided fields — all processing happens instantly in your browser.
Copy the output using the Copy button, or paste it directly into your project.
No sign-in required — the tool is ready to use immediately on page load.

When to use this in your project

Debugging API responses

Paste a deeply nested API response and collapse/expand nodes to find the field you need without manually reading raw JSON.

Writing JSONPath expressions

Test your JSONPath expression before using it in code — see exactly which values get selected.

Code review

Share a formatted JSON tree to explain the response shape to teammates in a PR description or documentation.

Developer notes

!All processing runs in your browser — no input is sent to Dev-Belt servers.

!This is a free tool — no account or sign-in required.

!If output does not match your expectations, check input encoding (UTF-8 vs ASCII) and whether trailing newlines are present.

Privacy & Security

All Dev-Belt tools run 100% in your browser using client-side JavaScript. Your input data is never sent to our servers, never logged, and never stored. This includes code snippets, credentials, tokens, API keys, and any other sensitive information you enter. We only track authentication events for account management — never tool usage, search queries, or input data.

Related keywords

jsondataviewerformatter

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246 Developer Tools — One Dashboard

JSON Tree Viewer is one of 246 browser-based tools on Dev-Belt. Free tools work instantly — no account required. Pro unlocks the full suite at $12/month.

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