FileNaut
Guides

JSON Viewer Online — Explore JSON as a Tree

Paste JSON and explore it as a collapsible, color-coded tree. 100% in your browser.

Input JSON
Tree View

Paste JSON on the left to see the tree. Try the .

What Is a JSON Viewer?

JSON is everywhere — API responses, config files, webhook payloads, and database exports all use it. But once a JSON document grows past a few lines, reading it as raw text becomes painful: nested objects and arrays blur together, and finding one field means scanning thousands of characters. A JSON viewer solves this by rendering your data as an interactive tree. Each object and array becomes a node you can expand or collapse, keys and values are color-coded by type, and you can search the whole structure to jump straight to what you need.

When to Use the JSON Viewer

Reach for the tree viewer whenever you need to understand JSON rather than reformat it:

  • Inspecting API responses — collapse the noise and drill into just the object or array you are debugging
  • Exploring deeply nested data — see the shape of unfamiliar payloads without counting brackets
  • Finding a specific field — filter by key or value and copy its exact path for your code
  • Reviewing config and export files — open large package.json, settings, or data dumps without your editor freezing

JSON Viewer vs JSON Formatter

These two tools solve different problems. The JSON Formatter takes messy or minified JSON and outputs clean, indented text you can copy back into your project — ideal when you need valid, readable source. The JSON Viewer keeps your data interactive: expand, collapse, search, and copy paths to explore structure quickly. A good workflow is to validate and tidy in the formatter, then explore the result here.

Your Data Stays Private

Everything runs client-side in your browser. Your JSON is never uploaded, logged, or stored on any server, which makes it safe to paste responses that include tokens, personal data, or internal identifiers. Close the tab and the data is gone. When you need to convert rather than read, FileNaut also offers JSON to CSV and CSV to JSON.

Frequently Asked Questions

What is a JSON viewer?▼
A JSON viewer turns raw JSON text into an interactive, collapsible tree. Instead of scrolling through a wall of text, you see the structure — objects, arrays, keys, and values — and can expand only the branches you care about. FileNaut color-codes each value type and lets you copy the path to any node.
How is the JSON viewer different from the JSON formatter?▼
The JSON Formatter outputs clean, indented JSON text you can copy back into your code. The JSON Viewer is for exploring — it renders an interactive tree you can expand, collapse, and search, which is far faster for understanding large or deeply nested API responses. Use the formatter to tidy JSON, the viewer to read it.
Is my JSON uploaded to a server?▼
No. Parsing and rendering happen entirely in your browser with JavaScript. Your JSON never leaves your device, so it is safe to paste API responses, tokens, or config files containing sensitive data.
Can I search inside the JSON?▼
Yes. The filter box matches keys and values anywhere in the tree and hides branches that do not contain a match, so you can jump straight to the field you need in a large document.
Can I collapse and expand nodes?▼
Click any object or array row to toggle it, or use Expand all / Collapse all to open or close the whole tree at once. Collapsed nodes show a count of how many keys or items they contain.
How do I copy the path to a value?▼
Hover over any row and click the copy icon. FileNaut copies the dot/bracket path (for example owner.roles[0]) so you can reference that field in your code or a tool like jq.
Is there a size limit?▼
There is no upload limit because everything runs locally. Very large files (tens of megabytes) render more slowly depending on your device, but typical API responses and config files open instantly.
What if my JSON is invalid?▼
The viewer flags invalid JSON and shows the parser error message so you can find the problem. For fixing and reformatting, switch to the JSON Formatter, which pinpoints syntax errors as you type.

Related Tools

JSON FormatterBase64 Encode/DecodeEpoch ConverterHash GeneratorUUID GeneratorDiff Checker
JSON Viewer Online — View & Explore JSON as a Tree Free | FileNaut