JSON Tree Viewer
View and explore JSON online as an interactive collapsible tree. Search keys, expand/collapse nodes, and navigate deeply nested JSON structures with ease.
About the JSON Tree Viewer
The DevToolHeaven JSON Tree Viewer renders JSON data as an interactive collapsible tree, making it easy to explore and understand nested structures at a glance. Each node shows its key, type badge, and value, with objects and arrays expandable to reveal their children.
Use the search box to instantly highlight matching keys and values across the entire tree. Click any primitive value to copy it directly to your clipboard. The Expand All and Collapse All controls let you navigate large structures efficiently — start collapsed for large documents and drill down into the sections you need.
Every value is labeled with its JSON type: object, array, string, number, boolean, or null. Array nodes show the item count and object nodes show the key count. This type information makes it immediately clear what kind of data you are working with before expanding a node, saving navigation time in deeply nested structures.
JSON tree visualization is especially valuable when exploring API responses from REST APIs or GraphQL queries, where the nested structure can be difficult to parse in raw text form. It also helps when auditing configuration files, inspecting database records exported as JSON, and understanding the shape of data before writing code to process it.
When you identify a value in the tree, the sequence of keys from the root shows you the exact access path in code — for example response.data.users[0].address.city. This makes the tree a practical reference when writing JavaScript, Python, or any language that navigates JSON by key.
All processing happens entirely in your browser. Your JSON data is never sent to a server, making this tool safe for sensitive or proprietary data including API responses with user information, authentication tokens, or internal configuration details.
Frequently Asked Questions
A JSON Tree Viewer displays JSON data as an interactive collapsible tree, making it easy to explore deeply nested structures. You can expand and collapse nodes, search for specific keys or values, and copy individual values with a single click.
Use the Expand All and Collapse All buttons in the tree panel header. Individual nodes can be toggled by clicking the arrow icon next to any object or array.
Type in the search box to highlight all keys and values that match your query. The search is case-insensitive and matches any substring. Matching text is highlighted in yellow so you can find values quickly in large JSON structures.
Click on any value (string, number, boolean, or null) in the tree to copy it to your clipboard. A brief "Copied" indicator confirms the action.
Yes. The tree is rendered entirely in your browser and handles JSON files with thousands of nodes. For very large files, use Collapse All to keep the view manageable and expand only the sections you need.
The JSON Formatter outputs plain text with indentation — ideal for copying and editing. The JSON Tree Viewer renders an interactive visual tree — ideal for exploring and understanding unfamiliar or deeply nested JSON structures.
Type the key name or value in the Search box — matching nodes are highlighted across all nesting levels instantly. You can also use Expand All to see the full structure, then scan visually. Each parent node shows its child count in brackets, helping you navigate toward the section of interest.
Each value is labeled with its JSON type: object, array, string, number, boolean, or null. Array nodes show the item count (e.g. [12 items]) and object nodes show the key count (e.g. {5 keys}). This lets you understand the shape of the data before expanding a node.
Copy the raw response from your browser Network tab (right-click the request > Copy Response), Postman, or curl, then paste it here. The tree viewer collapses all nodes by default so even very large responses load instantly. Use Expand All to see everything or search for a specific key to navigate directly to it.
Yes. In your browser console, run: copy(JSON.stringify(data)) to copy any JavaScript object to your clipboard, then paste it here to explore the structure interactively. This is faster than navigating the collapsible object in the browser console, especially for deeply nested responses.
Use the Search box at the top of the tree — type any key name or value and all matching nodes are highlighted instantly across all nesting levels. The search is case-insensitive and matches any substring, so typing "user" would match "userId", "username", and "currentUser".
The JSON Formatter outputs formatted plain text — ideal for copying into a file or editor. The JSON Tree Viewer renders an interactive visual tree — ideal for exploring and understanding unfamiliar structures. Use the Formatter when you need to edit or share JSON, and the Viewer when you need to navigate and inspect it.