HTTP Request Builder
Runs in browserBuild HTTP requests visually and copy as cURL or fetch().
Build and preview HTTP requests visually. Set method, URL, query params, headers, and body — then copy as cURL or JavaScript fetch().
HTTP Request Builder tool
Request Preview
curl \ 'https://api.example.com/users'
fetch("https://api.example.com/users", {
method: "GET",
});🔒 Runs in your browser · No uploads · Your data never leaves your device
How to use
Set method and URL
Choose from GET, POST, PUT, PATCH, DELETE, HEAD, or OPTIONS and enter the endpoint URL.
Add query params and headers
Fill in key-value rows for query parameters (auto-appended to URL) and request headers.
Configure body
For POST/PUT/PATCH, choose JSON, form-encoded, or raw body and fill in the content.
Copy output
Copy the assembled request as a cURL command or JavaScript fetch() snippet.
Common use cases
- Prototyping API calls during development — Build GET or POST requests with query params and headers in a visual interface, then copy as fetch() to paste into your JavaScript code.
- Creating reproducible API test cases — Assemble HTTP requests with full headers and body, then copy as cURL for sharing with teammates or adding to documentation.
Examples
GET with query params
Fetch users filtered by role.
OutputGET https://api.example.com/users?role=admin
Frequently asked questions
- Does this send the request?
- No. This tool assembles the request preview and copy-ready code but does not execute it.
- What body formats are supported?
- JSON (with auto Content-Type header), HTML form-encoded key-value pairs, and raw text.
Key concepts
- Query parameter
- A key=value pair appended to a URL after ? — used to pass filter, pagination, or search data in GET requests.
- fetch()
- The modern browser and Node.js API for making HTTP requests, returning a Promise — the JavaScript equivalent of cURL.
Related tools
You might find these useful too.
- cURL Generator
Generate cURL commands from method, URL, headers, and body instantly.
Open - cURL to Fetch Converter
Convert cURL commands to Fetch, Axios, or Node.js instantly.
Open - Webhook Tester
Generate a temp webhook URL to receive and inspect HTTP requests in real time.
Open - Docker Run to Compose
Convert docker run commands to docker-compose.yml YAML instantly.
Open