JSON Viewer Online — Free Tree & Structure Explorer
Paste any JSON and explore it as a collapsible tree. See types at a glance, copy any path with one click, and navigate deep structures without scrolling.
Ready when you are.
Paste JSON on the left, or click Sample to try a quick example. Validation runs as you type — entirely in your browser.
A JSON viewer for everyone
A good JSON viewer turns a wall of text into a navigable structure. Each branch can be expanded or collapsed; each value shows its type (string, number, boolean, array, object, null); and you can copy the path to any value in one click.
This viewer is built for engineers and non-engineers — analysts inspecting an API export, QA engineers triaging a captured webhook, support agents looking at a customer's saved settings. No tooling to install, no upload — just paste and explore.
Examples
{
"users": [
{"id":1,"name":"Ada"},
{"id":2,"name":"Linus"},
{"id":3,"name":"Grace"}
]
}▸ users: Array(3)
Click ▸ to drill in. Counts appear next to each container.
{ "name": "Ada", "age": 36, "admin": true, "team": null }name: "Ada" string · 3 age: 36 number admin: true boolean team: null null
{ "users": [ { "email": "ada@example.com" } ] }Hover users[0].email → click chip → $.users[0].email copied
{ "log": "<2,000 character log line>" }log: "<first 200 chars>…" show more
Long strings collapse with a 'show more' toggle so the tree stays scannable.
Use cases
- Triage API responses
Drop in a captured response and find the field you care about without scrolling through thousands of lines.
- Explore an unfamiliar payload
Learn the shape of a third-party API response visually — every container shows its size, every leaf its type.
- Pick selectors
Find the exact JSONPath of a value before writing a jq query, JMESPath expression, or front-end accessor.
- Compare two payloads
Open two browser tabs with different responses and visually diff which fields appear where.
- Demo for non-engineers
Walk a teammate through what a JSON file actually contains, without dumping raw text on them.
Frequently asked questions
What is a JSON viewer?+
An interactive view of a JSON document where nested objects and arrays can be expanded and collapsed, and each value shows its type. It makes deeply nested data easy to navigate without scrolling through thousands of lines.
How do I view a JSON file online?+
Paste the file's contents into the editor above (or drop the file onto the editor) and switch to the Tree tab. The structure becomes a clickable tree.
Is the JSON viewer free?+
Yes — completely free, no signup. Everything runs in your browser, so your data never leaves your device.
Can I view large JSON files?+
Up to 10 MB. Very large arrays auto-collapse beyond 100 items per container with a one-click "expand all" affordance.
How do I copy a JSON path?+
Hover any node in the tree and click the path chip ($.users[0].email) to copy it. Useful for jq, JMESPath, JavaScript accessors, and kubectl.
Read JSON values in code
Quick patterns for safely walking nested JSON in JS, Python, Go, and Ruby.
Read a deep field from a parsed JSON tree without fragile string indexing.
import { readFileSync } from "node:fs";
const data = JSON.parse(readFileSync("user.json", "utf8"));
console.log(data.user.address.city);{ "user": { "name": "Ada", "address": { "city": "London" } } }London
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All tools in one editor: validate, format, view, query.