Viewer Knowledge Base

JSON Viewer: Interactive Tree View for Any JSON Data

View JSON data in an interactive tree viewer online. Collapse nodes, search keys, and copy values. Handles large JSON files. Free, browser-only JSON viewer.

JSON Viewer vs JSON Formatter

While a JSON formatter shows formatted text, a JSON viewer presents the same data as an interactive, collapsible tree. This is especially valuable for deeply nested JSON (5+ levels deep) where even formatted text is difficult to navigate.

Tree Viewer Navigation

  • Click ▼ to expand a node and see child properties
  • Click ▶ to collapse a node and hide its subtree
  • Collapsed nodes show a preview: { id: 1, name: ... }
  • Array nodes show item count: [42 items]

Browser Extension vs Online JSON Viewer

Chrome and Firefox JSON viewer extensions auto-render JSON URLs in your browser's address bar. Our online viewer is better when you need to:

  • View JSON that was sent as a POST body (not a URL)
  • Edit and re-view the JSON after making changes
  • Search within the JSON for a specific key or value
  • Handle large JSON files without browser tab memory limits

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Frequently Asked Questions

What is the difference between a JSON viewer and a JSON formatter?

A formatter adds indentation to the text. A tree viewer displays JSON as an interactive collapsible hierarchy, making it easier to navigate deeply nested structures.

Is there a Chrome JSON viewer extension for JSON2X?

Not yet, but the browser-based tool works excellently: paste JSON from any source and get an instant interactive tree view.

Can the JSON viewer search for specific keys?

Yes. Use the search field to filter nodes by key name or value. Matching nodes are highlighted in real time.

How does the viewer handle very large JSON (100 MB+)?

The tree viewer uses virtual rendering (only visible nodes are rendered to the DOM) to handle large JSON files without significant memory usage.

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