JSON Tree Viewer

About this tool

View JSON as an indented tree with each key, its type, and its value, making nested structures easy to explore.

Example

Input: {"user":{"id":1}}

Output: root {object}\n user {object}\n id: 1 (number)

Privacy

This tool runs entirely in your browser. Your data is processed locally and never uploaded to a server.

How to use this tool

1. Paste valid JSON into the input area.
2. Click the button to build the tree view.
3. Expand nested objects or arrays to inspect deeper levels.
4. Read each node's key, type, and value to understand the structure.

Step by step, what happens

1. The tool reads the JSON text and checks that it is well formed.
2. It parses the data into objects, arrays, strings, numbers, booleans, and null values.
3. It renders the result as an indented tree so parent and child relationships are easy to see.
4. Each entry shows the key or index, the value type, and the stored value when there is one.

Worked example

Here is a small user profile JSON document that includes nested contact details.

Input: {"name":"Ava","age":28,"contact":{"email":"ava@example.com","active":true}}

1. Paste the JSON into the viewer and generate the tree.
2. The root level shows name, age, and contact as separate entries.
3. The contact object expands to show email and active, with their types and values.

Tips and common mistakes

• Make sure the JSON uses double quotes around keys and string values, or the viewer will not parse it.
• Use the tree to inspect nested arrays and objects one level at a time instead of scanning a large blob of text.
• If a value looks wrong, check its type in the tree, since numbers, booleans, and strings can look similar in raw JSON.
• Keep an eye on missing commas or extra trailing characters, because the viewer depends on valid JSON to render the structure.

Frequently asked questions