JSON Viewer

Turn any JSON document into a browsable, collapsible tree. Every branch shows its type and item count, string values are quoted and escaped, and long documents stay fast because branches only render when opened. Runs entirely in your browser.

Privacy: this tool processes your data entirely in your browser. Nothing you paste or type is sent to the server.

Paste the JSON document to explore.

Result

Enter your values and press Calculate — the result appears here.

Worked examples

Nested object with an array

  • json = {"users": [{"id": 1, "name": "Ada"}]}

Result: object (1 key) → users: array (1 item) → id: 1, name: "Ada"

Primitive document

  • json = true

Result: boolean: true

Frequently asked questions

How do I expand nested values?

Click any branch header to expand or collapse it. Branches with many children load on demand, so even large API responses stay responsive.

Do string values get escaped?

Yes — string values are shown with quotes and JSON escapes rendered literally (for example \n stays \n), so what you see is exactly what the document contains.

Is the JSON sent anywhere?

No. Parsing and rendering happen locally in your browser. You can safely paste sensitive configuration or test payloads.

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