QueryString JSON ConverterConvert query strings to JSON and JSON objects back to query strings.

QueryString JSON Converter

Convert query strings to JSON and JSON objects back to query strings.

Output
{
  "a": "1",
  "b": "hello",
  "tag": [
    "red",
    "blue"
  ]
}

Common tasks

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Features

  • Convert URL query strings to JSON objects
  • Convert JSON back to a query string
  • Decodes percent-encoded values automatically
  • Runs entirely in the browser

Frequently asked questions

What query-string formats are supported?
Standard ?key=value&key2=value2 syntax with automatic percent-decoding of values.
Does it preserve repeated keys?
Yes. Repeated keys become arrays in the JSON output, and arrays in JSON are serialised back as repeated keys.
Is my URL uploaded anywhere?
No. Parsing is purely client-side.