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HTTP Request Builder

Build HTTP requests with custom headers and body, then export as curl or fetch code.

curl -X GET \
  'https://api.example.com/users' \
  -H 'Accept: application/json'

About this tool

The HTTP Request Builder is a client-side tool that lets you construct HTTP requests with complete control over method, headers, and request body. Whether you're testing an API, debugging a backend service, or exploring a new endpoint, this tool eliminates the need for command-line curl or complex desktop applications. It generates ready-to-use curl commands and JavaScript fetch code that you can copy directly into your projects or terminal.

To use the tool, select your HTTP method (GET, POST, PUT, DELETE, etc.), enter the target URL, add custom headers in key-value format, and optionally include a request body in JSON, form-data, or plain text. Click the Send button to execute the request in real time and inspect the response status, headers, and body. The generated curl and fetch exports let you reproduce the exact same request anywhere—useful for documentation, automated tests, or sharing API workflows with teammates.

This tool is invaluable for API developers, QA engineers, and anyone integrating third-party services. Unlike heavyweight tools like Postman, it works directly in your browser without installation, keeping your workflow lightweight and portable. All processing happens locally, so your requests remain private and you can use it offline once loaded.

Frequently Asked Questions

Code Implementation

import requests
import json

BASE_URL = "https://api.example.com"

# GET request with query parameters
response = requests.get(
    f"{BASE_URL}/users",
    headers={"Authorization": "Bearer mytoken123"},
    params={"page": 1, "limit": 20},
)
print(response.status_code, response.json())

# POST with JSON body
new_user = {"name": "Alice", "email": "alice@example.com"}
response = requests.post(
    f"{BASE_URL}/users",
    headers={
        "Content-Type": "application/json",
        "Authorization": "Bearer mytoken123",
    },
    json=new_user,  # auto-serializes and sets Content-Type
)
print(response.status_code, response.json())

# PUT (full update)
response = requests.put(
    f"{BASE_URL}/users/1",
    headers={"Authorization": "Bearer mytoken123"},
    json={"name": "Alice Smith", "email": "alice@example.com"},
)

# PATCH (partial update)
response = requests.patch(
    f"{BASE_URL}/users/1",
    headers={"Authorization": "Bearer mytoken123"},
    json={"name": "Alice Smith"},
)

# DELETE
response = requests.delete(
    f"{BASE_URL}/users/1",
    headers={"Authorization": "Bearer mytoken123"},
)
print(response.status_code)  # 204 No Content

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