JSON Tree Viewer
Visualize JSON data as an interactive collapsible tree. Search keys and values, track JSONPath on hover, and handle large files with lazy loading. Drag & drop .json files supported.
What is a JSON tree viewer?
A JSON tree viewer is a tool that parses JSON text and renders it as an interactive, collapsible tree structure. Each node displays its key, type, and value preview, allowing you to visually explore deeply nested JSON data without reading raw text.
How do I expand and collapse tree nodes?
Click the chevron icon next to any object or array node to expand or collapse it. You can also click the node row itself. Use the "Expand All" and "Collapse All" buttons in the toolbar to toggle the entire tree at once.
How does the search feature work?
Type a keyword into the search box and the tool instantly highlights matching keys and string values. Matched rows are highlighted, and you can jump between matches using the prev/next buttons or Enter (forward) and Shift+Enter (backward) keys.
What is JSONPath and how do I copy it?
JSONPath is a dot-notation expression pointing to a specific node, e.g., $.user.address[0].city. Hover any node and its full path appears in the path bar; click the path or the copy icon to copy it to your clipboard.
Can I load JSON from a file?
Yes. Click the "Load File" button to browse for a .json file, or simply drag and drop a .json file onto the input area. The file contents are read locally in your browser and never uploaded to any server.
How are different value types displayed?
Each value type has a distinct color: strings are green, numbers are blue, booleans are orange, and null values are gray. Objects and arrays show a badge with the count of their children, like {3} or [5].
How does the tool handle very large JSON files?
When a node has more than 1000 children, the tool uses lazy loading: it renders the first 100 items and shows a "Load more" button at the bottom. This keeps the UI responsive even with arrays of thousands of entries.
Is my JSON data sent to a server?
No. All parsing, rendering, and searching happen entirely in your browser. Your JSON data never leaves your device, making this tool safe for sensitive or confidential data.
What happens when I paste invalid JSON?
The tool displays a clear error message below the input area showing the parse error and its location. The tree view remains empty until you fix the syntax and the input becomes valid JSON again.
Does this tool work offline?
Once the page is loaded, the tool runs entirely in your browser and can work without an internet connection. Only the initial page load requires network access to fetch the static assets.
How to Use JSON Tree Viewer
Paste JSON or drag & drop a .json file to explore it as an interactive collapsible tree. Everything runs locally in your browser — your data is never uploaded.
- Paste your JSON into the editor, or drag & drop a .json file straight onto the page.
- Click the arrows next to objects and arrays to collapse or expand branches and keep only relevant nodes visible.
- Type a key or value into the search box to highlight matching nodes across the whole tree.
- Hover over any node to see its JSONPath and copy the exact location of a nested value.
Large files stay fast thanks to lazy loading — branches are only parsed when you expand them.
Related Tools
- YAML Tree Viewer Parse YAML into an interactive collapsible tree. Supports multi-document YAML, anchors & aliases, search, JSON conversion, and drag & drop .yaml/.yml files.
- JSON Path Finder Navigate nested JSON data with path expressions. Supports dot notation, bracket notation, and array indexing with instant results and path listing.
- TSV to JSON Convert TSV to JSON online free. Supports headers, auto type detection, and minification. All processing in browser.
- JSON to CSV Free online JSON to CSV converter. Flatten nested objects with dot notation, choose custom delimiters, and download instantly. 100% browser-based, no upload needed.
- CSV to JSON Converter Convert CSV to JSON online free. Supports custom delimiters, header-based objects, auto type detection. All processing in browser.
- XML Beautifier Free online XML beautifier. Format, prettify and indent XML instantly in your browser with customizable options.
- XML Validator Validate XML syntax and structure instantly. Detect errors with precise line numbers and detailed messages. Free, secure, and runs entirely in your browser.
- SQL to JSON Convert SQL INSERT statements to JSON arrays or objects instantly. Supports multi-row VALUES, NULL handling, auto type detection, and pretty print. 100% client-side, no upload.