JSON Formatter Online

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A JSON formatter online helps you turn compact JSON into readable indented text, so it is easier to inspect fields, arrays, and nested objects.

Before and after example

Before: {"poNumber":"123456","items":[{"sku":"ABC123","quantity":10}]}

After:

{
  "poNumber": "123456",
  "items": [
    {
      "sku": "ABC123",
      "quantity": 10
    }
  ]
}

Use a JSON formatter online when you need to review API payloads, spot a missing field, or make a compact file easier to read before comparison.

It is especially useful for browser-local work where the payload should stay on the device instead of being sent to a remote formatter.

Open the JSON tool for formatting, validation, and minifying.