HTTP Request Builder Free Online Tool 2026

Last updated March 22, 2026

Building a GET Request

The HTTP Request Builder constructs and sends HTTP requests with full control over all parameters. Here is a basic GET request to a REST API:

/* Request configuration */
Method: GET
URL: https://api.example.com/users
Query Parameters:
  page=1
  limit=20
  sort=created_at
  order=desc

Headers:
  Accept: application/json
  Authorization: Bearer eyJhbGciOiJIUzI1NiJ9...
  X-API-Version: 2

/* Constructed URL */
GET https://api.example.com/users?page=1&limit=20&sort=created_at&order=desc

/* Equivalent curl command */
curl -X GET \
  "https://api.example.com/users?page=1&limit=20&sort=created_at&order=desc" \
  -H "Accept: application/json" \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiJ9..." \
  -H "X-API-Version: 2"

/* Response */
HTTP/2 200 OK
Content-Type: application/json
X-Total-Count: 142
X-Page-Number: 1

{
  "users": [
    { "id": 1, "name": "Alice", "email": "alice@example.com" },
    { "id": 2, "name": "Bob", "email": "bob@example.com" }
  ],
  "total": 142,
  "page": 1,
  "limit": 20
}

Building a POST Request with JSON Body

POST requests create new resources. The builder handles JSON body formatting and sets the correct Content-Type header:

/* Request configuration */
Method: POST
URL: https://api.example.com/users

Headers:
  Content-Type: application/json
  Accept: application/json
  Authorization: Bearer eyJhbGciOiJIUzI1NiJ9...

Body (JSON):
{
  "name": "Carol White",
  "email": "carol@example.com",
  "role": "editor",
  "preferences": {
    "notifications": true,
    "theme": "dark"
  }
}

/* Equivalent curl command */
curl -X POST \
  "https://api.example.com/users" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json" \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiJ9..." \
  -d '{
    "name": "Carol White",
    "email": "carol@example.com",
    "role": "editor",
    "preferences": {
      "notifications": true,
      "theme": "dark"
    }
  }'

/* Response */
HTTP/2 201 Created
Content-Type: application/json
Location: https://api.example.com/users/43

{
  "id": 43,
  "name": "Carol White",
  "email": "carol@example.com",
  "role": "editor",
  "created_at": "2024-01-16T08:45:22Z"
}

Building a PUT Request (Full Update)

PUT requests replace an entire resource. Here is updating a user record:

/* Request configuration */
Method: PUT
URL: https://api.example.com/users/43

Headers:
  Content-Type: application/json
  Authorization: Bearer eyJhbGciOiJIUzI1NiJ9...

Body:
{
  "name": "Carol Johnson",
  "email": "carol.johnson@example.com",
  "role": "admin",
  "preferences": {
    "notifications": false,
    "theme": "light"
  }
}

/* Equivalent curl */
curl -X PUT \
  "https://api.example.com/users/43" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiJ9..." \
  -d '{"name":"Carol Johnson","email":"carol.johnson@example.com","role":"admin","preferences":{"notifications":false,"theme":"light"}}'

/* PATCH request — partial update */
Method: PATCH
URL: https://api.example.com/users/43
Body:
{
  "role": "admin"
}
/* Only updates the role field, leaves everything else unchanged */

Form Data and File Upload Requests

The builder handles multipart form data for file uploads:

/* File upload request */
Method: POST
URL: https://api.example.com/uploads
Content-Type: multipart/form-data

Form Fields:
  title: "Profile Photo"
  description: "User avatar image"
  file: [binary file data]

/* Equivalent curl */
curl -X POST \
  "https://api.example.com/uploads" \
  -F "title=Profile Photo" \
  -F "description=User avatar image" \
  -F "file=@/path/to/photo.jpg"

/* URL-encoded form data (no files) */
Method: POST
URL: https://api.example.com/login
Content-Type: application/x-www-form-urlencoded

Body:
  username=alice&password=secretpassword&remember_me=true

/* Equivalent curl */
curl -X POST \
  "https://api.example.com/login" \
  -H "Content-Type: application/x-www-form-urlencoded" \
  -d "username=alice&password=secretpassword&remember_me=true"

Authentication Examples

The builder supports all common authentication schemes:

/* Basic authentication */
Method: GET
URL: https://api.example.com/protected
Authorization: Basic YWxpY2U6c2VjcmV0cGFzc3dvcmQ=
/* base64("alice:secretpassword") */

curl -u alice:secretpassword https://api.example.com/protected

/* Bearer token (JWT) */
Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkFsaWNlIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c

/* API key in header */
X-API-Key: sk_live_abcdefghijklmnopqrstuvwxyz123456

/* API key as query parameter */
GET https://api.example.com/data?api_key=sk_live_abcdefghijklmnopqrstuvwxyz123456

/* OAuth 2.0 token request */
Method: POST
URL: https://auth.example.com/oauth/token
Content-Type: application/x-www-form-urlencoded

Body:
  grant_type=client_credentials
  &client_id=your_client_id
  &client_secret=your_client_secret
  &scope=read:users write:users