JSON Tree Viewer
Explore and edit JSON in a collapsible tree
JSON input
JSON files up to 25 MiB
Repairs can change malformed data. Review the edited input before exporting.
Parser details
JSON viewer
Enter valid JSON to view its structure.
The tree shows a page of visible nodes. All data remains available in the tree and full exports.
Enter valid JSON to view its structure.
JSON statistics
- Object keys
- 0
- Total values
- 0
- Objects
- 0
- Arrays
- 0
- Strings
- 0
- Numbers
- 0
- Booleans
- 0
- Null values
- 0
- Maximum depth
- 0
- UTF-8 bytes
- 0
Using the viewer
Enter JSON to change its type, or plain text to save a string. Enter saves; Escape cancels.
- Load a file or sample to open the tree and collapse the input panel. Use Show input to edit the raw JSON.
- Typing keeps the input open. Formatting and minifying change the input without losing the parsed data.
- In tree mode, Copy uses formatted JSON. In code mode, Copy keeps the input formatting; the code preview and downloads use formatted JSON.
- Keys with dots, quotes or the name root are handled as literal keys.
- Edit primitive values with the pencil; delete requires confirmation. Edit objects and arrays through the raw input.
- Search matches keys and string values, including array strings. Select a match to reveal its exact location.
- Numbers use JavaScript’s numeric precision.
Free Online JSON Tree Viewer, Validator & Editor
Our JSON tree viewer transforms raw JSON data into an interactive, collapsible tree structure that makes even the most deeply nested objects easy to explore. Paste a JSON string, upload a .json file, or drag and drop one onto the page, and the tool instantly validates, parses, and renders your data in a navigable hierarchy with color-coded types for strings, numbers, booleans, and null values.
Beyond visualization, the tool doubles as a lightweight JSON editor. Hover over any primitive value in the tree to reveal edit and delete buttons, allowing you to modify data inline without switching to a separate editor. Changes are reflected immediately in the underlying JSON, which you can then copy or download. The built-in JSON validator highlights syntax errors in real time, and the auto-fix feature corrects common mistakes like unquoted keys, single quotes, and trailing commas.
A powerful search function lets you find keys and values across the entire structure, while the statistics panel provides a breakdown of total keys, objects, arrays, strings, numbers, booleans, nulls, max depth, and byte size. Open a nested API response to find one field, check a deployment config for a missing key, or browse a database export record by record, and this JSON viewer online keeps your workflow fast and your data private: your JSON is never uploaded.
Key Features
- Interactive tree view with expand, collapse, expand-all, and collapse-all controls
- Real-time JSON validation with descriptive error messages
- Auto-fix for common JSON errors: unquoted keys, single quotes, trailing commas, and undefined values
- Inline editing and deletion of values directly in the tree view
- Key and value search with highlighted results and path display
- JSON statistics panel: total keys, objects, arrays, strings, numbers, booleans, nulls, max depth, and size
- Format (pretty-print) and minify toggle for the raw JSON input
- File upload, drag-and-drop, copy to clipboard, and download as .json
- Toggle between tree view and code view
- Collapsible input panel for maximum tree viewing space
How to Use the JSON Tree Viewer
- Load your JSON: Paste JSON into the input area, click "Upload" to select a .json file, drag a file onto the input zone, or click "Load Sample" for a demo.
- Validate and parse: The tool validates your JSON in real time. If errors are detected, click "Fix JSON Errors" to auto-correct common issues.
- Explore the tree: Click nodes to expand or collapse them. Use "Expand All" and "Collapse All" for bulk navigation.
- Search for data: Type a key name or value into the search bar to locate matching entries with their full path.
- Edit or delete values: Use the edit or delete controls beside a primitive value. These controls remain available on touch screens; deletion requires confirmation.
- Export your data: Click "Copy" to place the JSON on your clipboard, or "Download" to save it as a .json file.
Use Cases
- API response debugging: Paste a REST or GraphQL response to visualize its structure and locate specific fields quickly.
- Configuration file inspection: Upload a package.json, tsconfig.json, or any config file to verify its structure and values.
- Data structure analysis: Use the statistics panel to understand the complexity of a JSON payload -- how deep it nests, how many keys it has, and its byte size.
- Quick JSON editing: Make small corrections to JSON data without opening a full IDE or text editor.
- Error correction: Fix malformed JSON from logs or third-party sources using the auto-fix feature before processing it in your application.
- Database export review: Inspect JSON exports from MongoDB, Firebase, or other document databases in a readable format.
- Teaching and learning: Visualize nested data structures for students learning about JSON, APIs, and data modeling.
Frequently Asked Questions
What JSON errors can the auto-fix correct?
The repair action attempts the original fixes for unquoted keys, single quotes, trailing commas and undefined values. It keeps the attempted input visible for review. Repairs can change malformed data and do not guarantee the intended meaning; already valid JSON remains unchanged.
Is there a size limit for JSON files?
Uploads and dropped files accept up to 25 MiB, including a file exactly at the limit. The viewer pages visible tree nodes while keeping the full data for editing and export. Large or very deeply nested JSON can still need more time or memory.
Can I edit nested objects or arrays in the tree?
Currently, inline editing and deletion are available for primitive values (strings, numbers, booleans, and nulls). To modify nested objects or arrays, switch to the input panel and edit the raw JSON directly.
Tips & Best Practices
- Format before exploring: Click "Format JSON" to pretty-print the input, making the raw text easier to read alongside the tree view.
- Collapse the input panel: After loading JSON, hide the input panel to give the tree maximum screen space for deep hierarchies.
- Use search for large files: Instead of manually expanding nodes in a large JSON, type a key or value into the search bar to jump directly to matches.
- Check statistics for quick audits: Use "Show Stats" to get a rapid overview of data complexity before diving into individual nodes.
- Drag and drop for convenience: Drag a .json file directly from your file manager onto the input area for the fastest way to load data.
- Download after edits: After making inline edits, click "Download" to save the modified JSON as a new file rather than overwriting the original.