JSON Tree Viewer & Explorer — Interactive JSON Visualizer
Paste any JSON document and the viewer renders it as a collapsible tree with one node per key, showing inferred data types, array lengths, and object sizes inline next to every branch. The first level auto-expands so you get an immediate overview, and you can expand or collapse every node at once with a single control when you need to zoom in or out.
This is the right tool when you are exploring an unfamiliar API response, auditing a large configuration payload, hunting for a specific deeply nested field, or reviewing log records where flat text becomes unreadable beyond a few levels. Clicking any node copies its JSONPath expression to the clipboard, which you can then paste into the JSONPath tester or into runtime code to extract that value programmatically.
The viewer is built for size: multi-megabyte documents remain responsive because nodes render lazily on expand, and empty objects and arrays render as explicit empty placeholders so you never confuse "missing" with "present but empty". Numbers keep their source precision, strings preserve whitespace, and null/true/false are rendered distinctly so types are always obvious.
All parsing and rendering happen locally — the document is never transmitted anywhere.
About JSON Tree Viewer
Visualize any JSON structure as an interactive, collapsible tree. Quickly navigate deeply nested data, see types and array lengths at a glance, and copy JSONPath expressions for any node.
- Auto-expands the first level for quick overview
- Expand or collapse all nodes at once
- Shows data types, array lengths, and object sizes
- Click any node to copy its JSONPath
- Handles empty objects and arrays gracefully
100% client-side. Your inputs never leave your browser. Ads via AdSense (consent required).
Frequently asked questions
How does the JSON tree viewer work?
Paste JSON and the viewer renders it as an interactive, collapsible tree. Every object and array becomes a node you can expand or collapse, making it easy to navigate deeply nested API responses. Keys, strings, numbers, booleans and nulls are color-coded by type, and hovering a value shows the full path (e.g., data.user.profile.email) so you can reference it in code without counting dots.
Is the JSON viewer free?
Yes, fully free and no signup. Explore JSON payloads of any size your browser can load — tens of megabytes on a modern machine. All of JSONCraft's tools are free with no premium tier and no artificial limits; the viewer is meant to replace the pain of scrolling through a minified blob in DevTools.
Does the viewer upload my JSON to a server?
No. The tree is built entirely in your browser from the JSON you paste — nothing is sent anywhere. This is critical for API responses that may include bearer tokens, session IDs or customer data; the viewer treats your input the same way as DevTools would, fully client-side. There is no account, no history, no logging.
Can I search and copy specific fields?
Yes. Full-text search highlights matches in keys and values, and every node has a click-to-copy action that copies either the value itself or the full JSONPath to it. That makes the viewer useful when you want to pull out one specific piece of a deeply nested response — the browser's native Ctrl+F works on the rendered tree as well.
Related guides
- Streaming JSON Parsers — Handling Arrays of a Million RecordsYou cannot JSON.parse a 5 GB file. Streaming JSON parsers process arrays one record at a time. Here is how oboe.js, stream-json, and ijson work in practice.
- JSONPath vs JMESPath vs jq — When to Use EachThree JSON query languages, three different sweet spots. A practical comparison of JSONPath, JMESPath, and jq with real queries and when to reach for each.