JSON & Query String Converter

Seamlessly convert between JSON objects and URL query strings.

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Fast Conversion

Lightning-fast conversion between JSON and URL parameters. Ideal for debugging APIs.

Deep Objects

Support for nested objects and arrays using bracket notation or dot notation.

Secure & Private

Processing happens entirely in your browser. No data is sent to our servers.

Understanding JSON and Query Strings

JSON (JavaScript Object Notation) is a lightweight data-interchange format, while a Query String is a part of a URL that assigns values to specified parameters.

How to use this tool?

  1. Select Mode: Choose between "JSON to Query String" or "Query String to JSON".
  2. Input Data: Paste your JSON object or URL query string into the input area.
  3. Configure Options: Enable/disable URL encoding or nested object support as needed.
  4. Get Result: The tool converts automatically as you type. Copy or download the result instantly.

Common Use Cases

  • API Development: Testing GET requests by converting JSON payloads to URL parameters.
  • Frontend Routing: Parsing URL parameters into state objects for React or Vue apps.
  • Web Scraping: Building complex URLs with multiple search parameters from JSON data.
  • Debugging: Quickly inspecting and modifying query parameters in a readable JSON format.

Handling Nested Data

Our tool uses the standard bracket notation for nested objects. For example:

JSON: {"user": {"name": "John", "age": 30}}
Result: user[name]=John&user[age]=30
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