A Local JSON Data Explorer is a browser-based tool that lets you paste, parse, and visually navigate JSON data in a tree structure. All processing happens locally on your device—no data is ever uploaded to any server. It also uses your browser's localStorage to save and manage multiple JSON documents for later retrieval.

Absolutely. This tool runs entirely in your browser. Your JSON data is never transmitted to any remote server, API, or third party. When you save documents, they are stored in your browser's localStorage, which is sandboxed per domain. You can delete saved data at any time, and clearing your browser cache will remove all stored documents.

localStorage is a key-value storage mechanism built into modern browsers. It can store up to 5–10 MB of data per origin (domain). JSON strings are ideal for localStorage because they are text-based. This tool stores your JSON documents as strings and retrieves them for viewing. Note that localStorage is synchronous and origin-specific, meaning data is only accessible from the same browser and domain.

The tree explorer renders JSON hierarchically with collapsible nodes. For large files: (1) Paste your JSON and click "Parse & View." (2) Use the search bar to find specific keys or values—matching nodes are highlighted in yellow. (3) Use "Collapse All" to get an overview, then expand only the sections you need. (4) The path bar shows the exact location of any clicked node for easy reference. For extremely large files (>5MB), consider splitting them into smaller documents.

The tool generates paths in JavaScript-style notation: dot notation for object properties (user.address.city) and bracket notation for array indices (items[0].name). For keys with special characters or spaces, bracket notation with quotes is used (data["special-key"]). You can copy any node's path with one click using the copy button in the path bar.

The tree explorer is designed as a read-only viewer for safe data exploration. To make changes, edit the JSON text directly in the left panel and click "Parse & View" again to refresh the tree. This approach prevents accidental data modification and keeps the exploration experience clean and predictable. Use "Beautify" to format your edited JSON before re-parsing.