Convert Form Data to JSON

How to use Convert Form Data to JSON

1. 1. Paste your form data. Paste the URL-encoded form data string, the kind you would find in a request body or a query string, with keys and values joined by equals signs and separated by ampersands.
2. 2. Set unnesting and type parsing. Turn on Unnest a[b] and a.b keys to rebuild nested objects and arrays from bracket or dot notation, and Parse numbers and booleans to convert values like true or 5432 into their real JSON types.
3. 3. Pick the output indent and copy. Choose 2 spaces, 4 spaces or tabs for the Indent setting, then copy the resulting JSON object and use it in your application code or API testing tool.

When to use Convert Form Data to JSON

Convert Form Data to JSON parses application/x-www-form-urlencoded data, the format traditional HTML forms and many legacy APIs use, into a proper JSON object, rebuilding nested keys along the way. Use Convert Form Data to JSON when you have this raw string and need structured data instead.

• Inspecting a request body captured from the network tab. You captured a form POST request in a browser's dev tools and want to see the submitted data as a readable JSON object instead of a raw urlencoded string.
• Migrating an endpoint from form data to JSON. You are updating an API to accept JSON instead of form-encoded bodies and want to see exactly what structure the old form submissions were sending.
• Debugging a webhook that sends urlencoded payloads. A third-party service sends webhook events as form-encoded data instead of JSON, and you want to convert a sample payload to inspect its actual shape.
• Reconstructing nested fields from a bracketed query string. A query string uses bracket notation for nested arrays and objects, and you want to see the equivalent JSON structure it represents.

Examples

user%5Bname%5D=Ada&user%5Btags%5D%5B0%5D=a&active=true

{
  "user": {
    "name": "Ada",
    "tags": [
      "a"
    ]
  },
  "active": true
}

About the Convert Form Data to JSON tool

Frequently asked questions