JSON Tree Viewer – View JSON as a Tree Online

What is a JSON Tree Viewer?

A JSON tree viewer displays a JSON document as a hierarchy instead of as lines of text. The root is the whole document, objects become nodes containing their keys, arrays become nodes containing their items, and every leaf shows its value together with its type - string, number, boolean, null, object or array.

The point of drawing the structure is that nesting stops being something you have to count. In a minified response you cannot tell by eye where one object ends, which key belongs to which level, or how deep a chain of braces goes. In a tree each level is one step further in, and any branch can be opened or closed on its own.

That makes a tree the fastest way to understand an unfamiliar JSON structure: inspect an API response before you write a query against it, find the field you need inside a deeply nested configuration, or confirm that a structure you are debugging is shaped the way you think it is.

How to view JSON as a tree

Paste your JSON into the JSON Input area and press View JSON Tree. The tree is drawn straight away and is rebuilt as you type, so fixing a syntax error brings the structure back without another click. Upload a .json file instead if the document is on disk.

Then explore it: click a row to open or close that branch, use Expand all in the tree header to open the entire document at once, type a key name into Search keys to highlight it, or press the copy button on a row to take just that value.

1. 1Paste your JSON into the JSON Input area, or upload a file.
2. 2Click View JSON Tree.
3. 3Click a node to expand or collapse that object or array.
4. 4Use Expand all, Search keys or the per-row copy buttons to explore it.

JSON tree viewer example

This is the JSON used above, and the shape it produces. A JSON visualizer is only easier to read if the structure it draws matches the document, so this is the same input, the same keys and the same array of two items:

{
  "user": {
    "name": "John",
    "age": 30,
    "address": {
      "city": "Lahore",
      "country": "Pakistan"
    }
  },
  "skills": [
    "JavaScript",
    "React"
  ]
}

root
├── user
│   ├── name
│   ├── age
│   └── address
│       ├── city
│       └── country
└── skills
    ├── 0
    └── 1

Common JSON structures and how the tree shows them

Every JSON document is built from the same handful of shapes, and the tree renders each one consistently: a container is shown with its size - {3} for an object with three keys, [2] for an array with two items - and a leaf is shown as its value with a type badge on hover.

Why viewing JSON as a tree helps

Reading is only the first use. A tree answers structural questions that are painful to answer from text: how deep is this document, which keys repeat at more than one level, what does this particular path contain, and where does a branch end.

It also shortens debugging. When a request returns a field you did not expect, opening the tree shows the field in place, with its parent and its type, instead of leaving you to scan a wall of text for the one key that matters.

JSON Tree Viewer vs JSON Beautifier

The two tools solve the same problem in different ways, and this page deliberately does not do the beautifier's job. The JSON Tree Viewer draws the structure as expandable nodes; the JSON Beautifier rewrites the document with indentation and line breaks so the text itself becomes readable. The tree is better when you want to explore a specific branch; the beautified text is better when you want to read the document top to bottom or paste it into a bug report.

If you need the layout, use the JSON Beautifier. If you need the structure, you are already in the right place.

Want the document laid out with indentation instead? Use the JSON Beautifier, which rewrites your JSON with a two-space indent and keeps every key, value and type exactly as they are.

JSON Tree Viewer vs JSON Minifier

The JSON Minifier works in the opposite direction. It removes every insignificant space, tab and newline so the document becomes the smallest possible single line, which is what you want for a URL, a request body or a cache key. The tree viewer never removes anything: it is a view of the JSON you pasted, and Copy JSON hands back exactly what you gave it.

Need the opposite – a compact payload for a URL or a request body? Try the JSON Minifier, which removes every space and newline without changing the data.

JSON Tree Viewer vs JSON Validator

A tree can only be drawn from a document that parses, so the viewer reports syntax errors as a side effect of building the tree - with the real parser message, line and column. The JSON Validator is the dedicated tool for that job: it reports every problem it finds as a formal result and is the better choice when validating rather than exploring.

Not sure your JSON will parse at all? Validate JSON syntax with the JSON Validator, which reports each syntax error with its line and column.

JSON Tree Viewer vs JSON Formatter

Neither tool needs the other. The JSON Formatter produces indented text, and this viewer produces an interactive hierarchy, so the output is different in kind rather than in degree - which is also why this page has no format or beautify button. Choose the formatter when you are preparing JSON to read or to commit, and the tree when you are trying to understand what is inside it.

Both pages stay, because they answer different questions. The JSON Formatter produces indented text; this viewer produces an interactive hierarchy, so there is no format button here to overlap with it.

What happens with invalid JSON

A tree can only be drawn from a document that parses. When the syntax is broken, this viewer reports the real parser error with the offending line and a caret under the character, and no tree is built until the JSON is fixed.

{"name":"John","age":30,}

Frequently Asked Questions