Developer Tools

Query String Parser

Parse URL query parameters into readable JSON while preserving repeated keys.

Free to use No account needed Quick result

Tool workspace

Private by design

Your result

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About the Query String Parser

The Query String Parser accepts a complete URL or text after the question mark. Duplicate names become arrays, plus signs follow form-query rules and build mode turns an object back into an encoded query.

How to use the Query String Parser

  1. Paste a URL/query or a JSON object.
  2. Choose parsing or building.
  3. Run the conversion and inspect repeated parameter values.

Practical tips

  • A URL fragment after # is not part of the query.
  • Use arrays in build-mode JSON to produce the same key more than once.
Helpful answers

Query String Parser FAQs