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API Request Builder
Build and send HTTP requests (GET, POST, PUT, DELETE) with custom headers, query params, and body. View formatted responses.
curl -X GET "https://api.example.com/users" \ -H "Content-Type: application/json"
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Frequently Asked Questions
API Request Builder is a free online tool that helps you build and send HTTP requests (GET, POST, PUT, DELETE) with custom headers, query params, and body. View formatted responses. It runs entirely in your browser — no sign-up or installation required.
Yes, API Request Builder is completely free. There are no hidden charges, subscriptions, or account requirements. You can use it as many times as you like.
API Request Builder uses industry-standard algorithms and formulas to ensure accurate results. All calculations are performed locally in your browser for speed and privacy. If you spot an issue, please let us know via the Contact page.