JSON Viewer Online

Visualize JSON data in an interactive tree — explore, search, and navigate complex structures

What Is a JSON Viewer?

A JSON viewer is a visual tool that renders raw JSON data as an interactive, collapsible tree structure. Instead of reading through dense text, you can expand and collapse objects and arrays, click on nodes to inspect individual values, and search across the entire document to locate specific keys or values. The tree view reveals the hierarchical relationships in your data at a glance.

JSON viewers are indispensable when working with large API responses, complex configuration files, or deeply nested data structures. They let you navigate to any depth level without losing context, copy individual node paths for use in code, and understand the shape of unfamiliar data returned by third-party APIs. For debugging, a viewer that highlights data types with color coding can immediately reveal type mismatches or unexpected null values.

How to View JSON Online

1. Paste your JSON data into the editor panel on the left
2. The tree view renders automatically in the output panel
3. Click the arrow icons to expand or collapse objects and arrays
4. Use the search bar to find specific keys or values across the entire document
5. Click any node to see its full path, which you can copy for use in your code

Why Use PinusX JSON Viewer?

PinusX renders your JSON tree entirely within your browser using 100% client-side code. Your data never leaves your device, which is essential when inspecting API responses that contain authentication tokens, user records, or internal system details. The risk of pasting sensitive JSON into server-based tools was demonstrated in November 2025, when jsonformatter.org leaked over 80,000 user credentials that had been processed through their servers. PinusX eliminates this attack surface because nothing is transmitted — the tree rendering, search indexing, and path generation all happen locally in your browser. Use it safely with production data, internal APIs, and confidential configurations.

Frequently Asked Questions

Can the JSON viewer handle large files?

Yes. The viewer uses virtualized rendering, which means only the visible portion of the tree is rendered in the DOM. This allows you to work with JSON files containing thousands of nodes without freezing the browser. Files up to 10MB render smoothly on modern devices.

How do I search within JSON data?

Use the search bar above the tree view. Type any key name or value to filter the tree and highlight matching nodes. The search works across all depth levels including deeply nested objects and array elements. Press Enter to jump between matches.

Can I copy a specific node path?

Yes. Click on any key or value in the tree view to select it. The full JSONPath (like $.employees[0].name) appears in the path bar and can be copied with one click. This is useful for writing code that accesses specific fields in the data structure.

Does the viewer support JSON with special characters?

Yes. The viewer correctly handles and displays Unicode characters, escaped sequences, newlines within strings, and special JSON values like null, true, false, and numeric types including scientific notation. All values are displayed with their actual content.

Is this viewer free to use?

Completely free with no usage limits, no signup requirements, and no feature restrictions. Since PinusX processes everything in your browser, there are no server costs that would require a paid tier. All features are available to every user.

Your data never leaves your browser. 100% client-side processing.