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Query String & JSON Converter

Turn a URL query string into readable JSON, or build a query string from JSON.

Result appears here…
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What this tool does

A query string is the part of a URL after the ? that carries parameters as key=value pairs. This converter parses it into a clean JSON object (URL-decoding each value) and can rebuild a query string from JSON — handy for debugging links, APIs and analytics tags.

Example

?name=Ada&role=dev becomes {"name":"Ada","role":"dev"}. Repeated keys like tags=a&tags=b become an array.

Notes

  • A leading ? is optional and is ignored.
  • Values are URL-decoded, so %20 becomes a space.
  • When converting JSON to a query string, array values are repeated for the same key.
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