JSON Viewer Online - Interactive Tree View
Visualize JSON data with tree structure - Supports collapse/expand, search & locate
JSON Viewer Tips - How to Use JSON Tree Viewer
Frequently Asked Questions
How to view nested JSON data?
Paste JSON data on the left, it will automatically display as a tree structure on the right. Click the arrow or text on the left of any node to expand/collapse that node.
How to copy JSON path for a field?
Hover over any field, a "Copy" button will appear. Click it to copy that field's JSONPath to clipboard, for example $.user.profile.name.
Does it support search?
Yes! Click the "Search" button or use the top search box, enter keywords. Matching content will be highlighted, supporting search for both key names and values.
Can I export the tree view as an image?
Current version supports copying tree structure as text format. For image export, we recommend using browser's screenshot feature or screenshot tools.
About This JSON Viewer
Interactive tree visualization and exploration of JSON data. This tool is part of the AI JSON Tools collection, providing specialized functionality for developers working with JSON data. All processing happens entirely in your browser—your data never leaves your device.
Interactive Tree Navigation
The JSON viewer transforms flat JSON text into an interactive tree structure. You can expand/collapse nodes, search for specific keys or values, filter by data type, and navigate large documents efficiently. The tree view shows data types with color-coded icons: objects (blue), arrays (green), strings (orange), numbers (purple), booleans (red), and nulls (gray). This visual representation makes it immediately obvious when data structures don't match expectations.
Advanced Search and Filtering
Search across the entire JSON document with regular expression support. Filter by data type to focus on relevant information (e.g., show only string values when looking for error messages). The path breadcrumb shows your exact location in the document hierarchy. You can copy paths in dot notation (user.address.city) or JSON Pointer format (/user/address/city) for use in code. The search highlights all matches and allows quick navigation between them.
Performance Optimized for Large Documents
Traditional JSON viewers struggle with documents larger than a few megabytes. Our viewer uses virtual scrolling and lazy loading to handle files up to 100MB. Only the visible portion of the tree is rendered, with nodes loading on demand as you expand them. This keeps memory usage under 50MB even for massive JSON files. The viewer also includes a 'collapsed by default' mode for initial exploration of large documents.
Data Analysis Features
Beyond viewing, the tool provides analysis: count of objects, arrays, strings, numbers; depth statistics (maximum nesting level); size estimation (compressed vs uncompressed); and duplicate detection. For arrays of objects, it can generate a table view showing common fields. This is particularly useful for exploring API responses or database dumps where you need to understand the data structure before writing code to process it.
Privacy & Security Guarantee
No data leaves your browser. All JSON processing happens locally using JavaScript. This means you can safely work with sensitive information like API keys, authentication tokens, customer data, and proprietary configurations. There is no server-side processing—we don't even have servers that could store your data.