Free API Request Builder Online

Build HTTP API requests instantly using browser-based processing. Generate Fetch API code, JSON payloads and request headers quickly.

What is an API Request Builder?

An API request builder helps developers create HTTP requests quickly using methods, headers and JSON payloads.

API builders are commonly used for frontend development, backend debugging and REST API testing.

Supported Features

• GET requests
• POST requests
• PUT and PATCH requests
• Custom headers
• JSON request bodies
• Fetch API generation

Browser-Based Privacy

All request generation happens locally in your browser. No API requests or data are uploaded to servers.

Common Use Cases

• REST API testing
• Frontend integration
• Learning Fetch API
• Backend debugging
• Developer productivity workflows

Related Tools

cURL to Fetch Converter, JSON Validator, URL Parser, Code Formatter

Frequently Asked Questions

What is Fetch API?

Fetch API is a modern JavaScript interface used for making HTTP requests.

Can I generate POST requests?

Yes. POST, PUT, PATCH and DELETE requests are supported.

Does this tool send real API requests?

No. This tool generates request code locally in your browser.

Can I copy generated Fetch code?

Yes. Generated Fetch API code can be copied instantly.