liminfoJSON Tree Viewer
Free web tool: JSON Tree Viewer
About JSON Tree Viewer
The JSON Tree Viewer parses raw JSON text and renders it as a fully interactive, collapsible tree structure in your browser. Each node shows its key name alongside the value's data type using distinct colors: strings appear in green, numbers in blue, booleans in red, and null values in grey. Object and array nodes display the number of child keys or items in brackets and can be expanded or collapsed with a single click. Nodes at depth 0 and 1 are expanded by default so you immediately see the top-level structure without any interaction.
This tool is ideal for API developers, QA engineers, and data analysts who need to explore large or deeply nested JSON payloads quickly without switching to a code editor. Because the entire tree is rendered in the browser using React state — no server round-trips, no file uploads — you can inspect private or sensitive JSON responses from internal APIs without any data leaving your machine.
A particularly useful feature is the path copy button that appears on hover for every node in the tree. Clicking it copies the JSONPath-style dot/bracket notation for that node to the clipboard — for example $.users[0].address.city — making it trivial to reference a specific field in code, write query filters, or share the exact location of a value with a colleague.
Key Features
- Renders JSON as a fully interactive collapsible tree
- Color-coded types: green strings, blue numbers, red booleans, grey null
- Object and array nodes show child count (e.g. "{ 5 keys }" or "[ 3 items ]")
- Auto-expands nodes at depth 0 and 1 on parse for instant overview
- Hover-revealed path copy button on every node
- Copies JSONPath dot/bracket notation (e.g. $.users[0].name) to clipboard
- Clear parse error messages with the JavaScript engine error detail
- 100% client-side — JSON never leaves your browser
Frequently Asked Questions
How do I use the JSON Tree Viewer?
Paste your JSON into the textarea and click "Parse JSON". The tree renders immediately. Click any object or array node to expand or collapse it. Hover over any node to reveal the "path" button and copy its JSONPath.
What types does the color coding cover?
Strings are shown in green, numbers in blue, booleans in red, null values in grey, and object/array container nodes in neutral dark grey. This makes it easy to spot type mismatches at a glance — for example, a number stored as a string will appear green instead of blue.
What is the path that gets copied when I click "path"?
The copied path is a JSONPath-style string starting with $. For arrays the index is in brackets (e.g. $.items[2].name) and for objects the key is separated by a dot. This notation is compatible with jq, JSONPath libraries, and many API testing tools.
Can it handle very large JSON files?
The viewer renders the entire parsed tree as React components, so extremely large JSON (hundreds of thousands of nodes) may cause slow initial renders. For exploration purposes, collapsing top-level nodes and only expanding sections of interest keeps performance smooth.
What happens if my JSON is invalid?
The tool catches the JSON.parse error and displays it in a red error panel with the engine's error message — typically including the line and character position of the syntax error. Fix the issue in the textarea and re-parse.
Does this tool validate JSON schema?
No, the tool validates only that the input is parseable JSON (syntax validation). It does not validate against a JSON Schema definition. For schema validation, tools like ajv or jsonschema validators are more appropriate.
Can I view JSON from a URL?
This tool accepts pasted text input only. To view JSON from a URL, fetch it with curl or your browser's developer tools Network tab, copy the response body, and paste it here.
Is my JSON data safe?
Yes. The tree is rendered entirely using browser-side React and JavaScript. No data is sent to any server. You can safely paste sensitive API responses, tokens, or internal data structures.