Query Parameters to JSON

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Convert URL query parameters to a structured JSON object.

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About Query Parameters to JSON

Paste a URL query string and instantly get a clean JSON object with parameter names as keys and their values. Handles duplicate parameters (as arrays), URL-encoded characters, and works with or without the leading question mark.

How to use

  1. Paste a URL or query string into the input panel.
  2. The JSON object appears instantly in the output panel.
  3. Click Copy to copy the JSON to your clipboard.

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Frequently Asked Questions

FAQs about Query Parameters to JSON

Do I need to include the question mark?

No. The tool works with or without a leading "?" character.

How are duplicate parameters handled?

Parameters that appear multiple times are combined into a JSON array. For example, "tags=dev&tags=qa" becomes {"tags": ["dev", "qa"]}.

Are URL-encoded characters decoded?

Yes. The tool uses the browser's URLSearchParams API which automatically decodes percent-encoded characters (e.g., %20 becomes a space).

Can I paste a full URL?

Paste just the query string portion (after the ?). If you paste a full URL, strip the base URL first.

Is my data safe?

Yes. All parsing happens in your browser. No data is sent to any server.