JavaScript Fetch API Code Generator
Generate JavaScript fetch() calls without writing boilerplate. Configure your request visually and get clean, copy-paste-ready fetch code with proper headers, body serialization, and error handling.
HTTP Request Builder
Build HTTP requests visually and generate code in cURL, JavaScript, Python, Go, Rust, or PHP. The reverse of cURL to Code.
About HTTP Request Builder
- Build HTTP requests visually — set method, URL, headers, query parameters, auth, and body without writing code.
- Generate code in 6 languages: cURL, JavaScript (fetch), Python (requests), Go (net/http), Rust (reqwest), and PHP (curl).
- Supports Bearer tokens, Basic Auth, and API key authentication in headers or query parameters.
- This is the reverse of cURL to Code — build a request visually instead of parsing a command.
- Everything runs in your browser — no data is sent over the network.
The Fetch API basics
The Fetch API is the modern standard for making HTTP requests in JavaScript, replacing XMLHttpRequest. It returns Promises and integrates with async/await. A basic fetch call takes a URL and an options object with method, headers, and body. The visual builder above generates properly structured fetch() calls with JSON.stringify for body, correct Content-Type headers, and response parsing.
// GET request with fetch
const response = await fetch("https://api.example.com/users", {
method: "GET",
headers: {
"Accept": "application/json",
"Authorization": "Bearer eyJ..."
}
});
const data = await response.json();
console.log(data);POST with JSON body
To send JSON with fetch, set the Content-Type header to application/json and pass JSON.stringify(data) as the body. The visual builder handles this automatically when you select JSON body type. Remember that fetch does not reject on HTTP error status codes (4xx, 5xx) — you need to check response.ok or response.status manually.
// POST with JSON body
const response = await fetch("https://api.example.com/users", {
method: "POST",
headers: {
"Content-Type": "application/json"
},
body: JSON.stringify({
name: "John Doe",
email: "john@example.com"
})
});
const data = await response.json();Frequently Asked Questions
What is the difference between fetch and axios?
fetch() is built into browsers and Node.js 18+ — no dependencies needed. axios is a third-party library that adds automatic JSON parsing, request interceptors, timeout support, and progress events. For simple requests, fetch is sufficient. For complex apps with retry logic and interceptors, axios adds value.
Does fetch work in Node.js?
Yes, since Node.js 18. The global fetch() is available without imports. For older Node.js versions, use the node-fetch package or the built-in http/https modules.
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