Interactive HTTP Request Builder

Build, visualize, and understand HTTP requests and responses with this interactive tool

This interactive tool allows you to construct HTTP requests by selecting a method, entering a URL, adding headers, and providing a request body. You can see how your request is structured in both formatted and raw views, and simulate sending the request to see what a response might look like.

How to use this tool

  1. Select an HTTP method (GET, POST, PUT, etc.)
  2. Enter a URL
  3. Add any headers you want to include
  4. For POST, PUT, or PATCH requests, add a request body (typically JSON)
  5. Click "Preview Request" to see how your request is structured
  6. Click "Send Request" to simulate sending the request and see a response

Special URL patterns for testing

You can include certain keywords in your URL to simulate different response types:

  • error or fail - Returns a 400 Bad Request response
  • notfound - Returns a 404 Not Found response
  • server-error - Returns a 500 Internal Server Error response
  • unauthorized - Returns a 401 Unauthorized response

Interactive HTTP Request Builder

Build and visualize HTTP requests

GET

Learning HTTP through this tool

This tool is designed to help you understand how HTTP requests and responses work. Here are some key concepts you can explore:

HTTP Methods

Different HTTP methods serve different purposes:

  • GET - Retrieve data from a server
  • POST - Create a new resource on the server
  • PUT - Update an existing resource (replacing it entirely)
  • PATCH - Partially update an existing resource
  • DELETE - Remove a resource from the server

HTTP Headers

Headers provide additional information about the request or response. Common headers include:

  • Content-Type - Specifies the format of the data (e.g., application/json)
  • Authorization - Contains credentials for authenticating the client
  • Accept - Indicates what content types the client can process
  • User-Agent - Identifies the client making the request

HTTP Status Codes

Status codes indicate the result of the request:

  • 2xx - Success (e.g., 200 OK, 201 Created)
  • 3xx - Redirection (e.g., 301 Moved Permanently)
  • 4xx - Client errors (e.g., 404 Not Found, 400 Bad Request)
  • 5xx - Server errors (e.g., 500 Internal Server Error)