Query Parameters to JSON

api tools

Bidirectional converter between URL query strings and structured JSON objects with array notation and type coercion.

100% Client-Side — Processed privately & locally in your browser.

Example Scenarios

Auto type cast (numbers, booleans, null)Parse nested brackets: `filter[type]=active`

URL or Query StringQuery String

Parsed JSON OutputParsed JSON9 params

{
  "query": "mechanical keyboard",
  "category": "peripherals",
  "page": 1,
  "limit": 24,
  "sort": "price_asc",
  "filter": {
    "inStock": true,
    "minPrice": 50
  },
  "tags": [
    "wireless",
    "rgb"
  ]
}

1Paste a full URL or query string (e.g. ?name=john&tags=dev&tags=admin) to parse it into clean JSON.
2Toggle type coercion to automatically convert numeric and boolean strings into native JSON types.
3Switch to JSON → Query String mode to serialize complex JSON structures into URL-encoded parameters.
4Use the interactive key-value table for quick manual modifications.

Frequently Asked Questions

Is my data sent to any server?

No. All processing for this tool occurs directly within your web browser using Web APIs and WebAssembly. Your data never leaves your computer.

Can I use this tool offline?

Once loaded, most utilities remain functional even if your connection drops. DevtUtils is designed to be lightweight and resilient.

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