cURL to JSON Importer & API Sandbox

Import raw cURL commands copied from DevTools or Postman. Automatically extracts HTTP method, headers, target URL, and JSON request body for instant testing.

Open cURL to JSON API Client →

cURL Input Command

curl -X POST https://api.example.com/v1/auth \
  -H 'Content-Type: application/json' \
  -d '{"client_id": "app_44", "grant_type": "password"}'

Parsed JSON Body & Headers

{
  "client_id": "app_44",
  "grant_type": "password"
}

cURL Command Parser

Parses single-line & multi-line cURL strings (-X POST, -H, -d).

Workbench Integration

Loads API JSON responses into workbench tabs with 1-click.

Private & Offline

Stores request history locally in IndexedDB.

Frequently Asked Questions

How do I import a cURL command to JSON?

In Chrome/Firefox DevTools, right-click any network request and select "Copy as cURL". Paste it into JSON OS to automatically parse headers, parameters, and payloads.