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JSON Form Encoder

Convert between JSON and URL form-encoded format (application/x-www-form-urlencoded). Supports nested objects with PHP/jQuery bracket notation.

Features

  • JSON to Form-Encoded - Convert JSON objects to query string format
  • Form-Encoded to JSON - Parse query strings back to JSON objects
  • Space encoding options - Use + or %20 for spaces
  • Key sorting - Alphabetically sort parameters

How to Use

  1. Paste your JSON or form-encoded string
  2. Select the conversion direction
  3. Configure encoding options
  4. Click "Convert"

Options

  • Use + for spaces - Encode spaces as + instead of %20 (common in form submissions)
  • Sort keys alphabetically - Output parameters in alphabetical order

What is Form-Encoded?

The application/x-www-form-urlencoded format is used by HTML forms and many APIs. It represents data as key-value pairs separated by &, with special characters percent-encoded.

Example:

  • JSON: {"name": "John Doe", "age": 30}
  • Form-encoded: name=John+Doe&age=30

Nested Object Handling

Nested objects use bracket notation:

  • JSON: {"user": {"name": "John"}}
  • Form-encoded: user[name]=John