Developer Tools

Query Parameters to JSON

Convert URL query strings into clean JSON objects, preserving repeated parameters as arrays.

URL or Query String

JSON Output

{
  "utm_source": "google",
  "utm_campaign": "launch",
  "id": [
    "123",
    "456"
  ]
}

How to use the Query Parameters to JSON

Paste a URL

Use a full URL or just the query string.

Inspect JSON

Parameters are decoded and grouped automatically.

Copy output

Copy the JSON for debugging, analytics, or API tests.

About the Query Parameters to JSON Tool

Convert URL query strings into clean JSON objects, preserving repeated parameters as arrays. The query parameters to json runs in your browser unless the page states that it uses an external service.

Frequently Asked Questions

Is data uploaded to a server?

No. This tool runs in your browser unless the interface clearly says it needs a network request.

Can I use it for private data?

Yes. The conversion and preview steps happen locally in your browser.

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