Fabreco StudioDeveloper toolsURL encoded to JSON

01 / Browser converter

x-www-form-urlencoded to JSON converter

Form data, query string, or URL
JSON output
{}

Your formatted JSON will appear here.

Paste encoded data and convert it—nothing leaves this browser.

Free browser tool · Input stays on your device

Fast, private conversion. Right in your browser.

Paste form data, a query string, or an entire URL. Get readable JSON without uploads, accounts, or data leaving your browser.

Understand the conversion

How it works

From tangled query string to useful JSON.

The converter follows standard form-encoding rules, including percent escapes, plus-sign spaces, empty values, and repeated fields.

  1. 01

    Paste anything useful

    Use raw x-www-form-urlencoded data, a query string beginning with ?, or a complete URL.

  2. 02

    Decode correctly

    Encoded characters become readable, values can contain equals signs, and URL fragments are ignored.

  3. 03

    Copy structured JSON

    Repeated field names become arrays, so no submitted value is silently discarded.

API for agents and automation

Use the converter without the interface.

The versioned, stateless JSON API is described with OpenAPI and discoverable through an IETF API catalog and llms.txt.

OpenAPI JSONllms.txt

Privacy note: unlike the browser converter, API requests transmit input to the server for processing. Input is not persisted.

curl -X POST \
  https://x-www-form-urlencoded-to-json.fabreco.studio/api/v1/convert \
  -H "Content-Type: application/json" \
  -d '{"input":"name=Tom&age=68"}'

Accepted input

Bring the data in the form you have it.

Raw form body

name=Ana+Silva&active=true

Full URL

https://example.com/?page=2&sort=new

Repeated fields

tag=design&tag=development