🌲

JSON Viewer

Explore JSON in a collapsible, interactive tree structure.

JSON ToolsBrowser-only • PrivateFree

JSON Input

Tree View

Interactive tree will appear here...

Privacy First: All processing happens locally in your browser. Your data never leaves your device and is never uploaded to any server.

About JSON Viewer

The JSON Viewer renders JSON as a collapsible tree so you can expand and collapse objects and arrays to navigate deeply nested data without scrolling through thousands of lines. It's built for inspecting large API responses and config files where raw text is unreadable. Everything is parsed locally in your browser, so sensitive payloads stay on your device. For a flat, indented layout instead, try the JSON Formatter, or the JSON Path Tester to query specific values.

How to Use

1Open JSON Viewer and paste or type your data into the input area.
2Adjust any available options to match the result you want.
3Your output is generated instantly — no button-clicking required for most tools.
4Use the Copy or Download button to save your result.

Common Use Cases

Debugging API responses while building web and mobile apps
Cleaning up minified or messy JSON from logs and network tabs
Preparing configuration files and fixtures for testing
Converting data between JSON and other formats for imports/exports

Frequently Asked Questions

Can the JSON viewer handle large files?

Yes. The tree renders lazily as you expand nodes, so large, deeply nested JSON stays responsive instead of dumping thousands of lines of text at once.

How is a viewer different from a formatter?

A formatter pretty-prints the whole document as indented text. The viewer builds an interactive tree you can collapse node by node, which is easier for exploring unknown or deeply nested structures.

Is JSON Viewer free to use?

Yes. JSON Viewer is completely free with no sign-up, no subscription, and no usage limits. Every tool on CodeUtilityKit is free forever.

Is my data safe when I use JSON Viewer?

Absolutely. JSON Viewer runs entirely in your browser. Your input is processed locally with JavaScript and is never sent to, stored on, or logged by any server — so it is safe even for private or sensitive data.