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HTTP Request Builder

Import curl commands or visually build HTTP requests, then generate curl, fetch, axios, Python requests, Go net/http, C# HttpClient, and PHP cURL snippets.

Free to use No sign-up Runs in your browser

Tool workspace

curl -X GET \
  -H 'Authorization: ******' \
  'https://api.example.com/users'

What Is an HTTP Request Builder?

An HTTP Request Builder helps developers construct and translate HTTP API requests without writing every client from scratch. Paste a common curl command using request, header, data, and URL arguments, or select the method, URL, headers, body, and content type visually. The tool generates ready-to-use curl, Fetch API, axios, Python requests, Go net/http, C# HttpClient, and PHP cURL snippets for API testing, documentation, and prototyping.

How to Use the HTTP Request Builder

  1. 1Paste a curl command and click Import, or start by selecting the HTTP method (GET, POST, PUT, PATCH, or DELETE).
  2. 2Enter the API endpoint URL in the URL input field.
  3. 3Add request headers by clicking 'Add' and entering key-value pairs. Common headers like Authorization are pre-filled as examples.
  4. 4For POST, PUT, and PATCH requests, select the Content-Type and enter the request body in the textarea.
  5. 5Switch between curl, fetch, axios, Python, Go, C#, and PHP tabs to view generated code in your preferred language.
  6. 6Click the copy button to copy the generated code to your clipboard.

Common Use Cases

API Testing & Debugging

Quickly build HTTP requests to test REST API endpoints. Generate curl commands to run in the terminal or fetch code to paste into the browser console.

Documentation & Team Collaboration

Create well-formatted API request examples for documentation, code reviews, or sharing with teammates who use different HTTP clients.

Learning HTTP & REST APIs

Understand how HTTP requests are structured by importing or building one request and comparing equivalent code across command-line and programming-language clients.

Rapid Prototyping

Generate boilerplate API calls for JavaScript, Python, Go, C#, or PHP and paste them into your application as a starting point for integration.

Frequently asked questions

Does this tool actually send HTTP requests?

No, this tool only parses request details and generates code snippets in your browser. It does not send requests to the specified URL.

What is the difference between fetch and axios?

The Fetch API is built into modern browsers and Node.js 18+, requiring no additional dependencies. Axios is a third-party HTTP client library that provides features like automatic JSON parsing, request/response interceptors, timeout configuration, and broader browser compatibility. Both achieve the same goal of making HTTP requests.

When should I use different Content-Type values?

Use 'application/json' for sending structured JSON data (most common for REST APIs). Use 'application/x-www-form-urlencoded' for HTML form submissions. Use 'text/plain' for sending raw text. The Content-Type header tells the server how to parse the request body.

Can I add custom headers to the request?

Yes, click the 'Add' button to add as many custom headers as needed. Common headers include Authorization (for API keys or tokens), Accept (to specify expected response format), and X-Custom-Header for application-specific headers.