cURL to Code: Convert cURL Commands to JavaScript, Python, Go & More

cURL: The Universal API Language

cURL is the lingua franca of API documentation — every REST API shows examples as cURL commands. But when you're building an app, you need the request in your language: JavaScript fetch, Python requests, Go's net/http, PHP's curl, or Java's HttpClient. A converter reads the cURL flags and options and generates the equivalent code in your target language with proper syntax, error handling, and conventions.

Anatomy of a cURL Command

curl -X POST https://api.example.com/users \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer tok_abc123" \
  -d '{"name":"Jane","email":"jane@example.com"}'

Breaking this down: -X POST sets the HTTP method. -H adds a header. -d sends data in the request body. Other common flags: -u for basic auth, -F for multipart form data, -G to send data as query parameters, and -o to write output to a file.

JavaScript (fetch)

fetch("https://api.example.com/users", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "Authorization": "Bearer tok_abc123"
  },
  body: JSON.stringify({ name: "Jane", email: "jane@example.com" })
});

Python (requests)

import requests

response = requests.post(
    "https://api.example.com/users",
    headers={
        "Content-Type": "application/json",
        "Authorization": "Bearer tok_abc123"
    },
    json={"name": "Jane", "email": "jane@example.com"}
)

Go (net/http)

import (
    "bytes"
    "net/http"
)

body := []byte('{"name":"Jane","email":"jane@example.com"}')
req, _ := http.NewRequest("POST", "https://api.example.com/users", bytes.NewBuffer(body))
req.Header.Set("Content-Type", "application/json")
req.Header.Set("Authorization", "Bearer tok_abc123")
client := &http.Client{}
resp, _ := client.Do(req)

Common cURL Flag Translations

• -X / --request: Sets the HTTP method. Defaults to GET when -d is absent, POST when present.
• -H / --header: Each header becomes a key-value entry in the target language's header collection.
• -d / --data: Sends the body as application/x-www-form-urlencoded unless Content-Type is set to application/json. Use --data-raw to send exactly what you type.
• -u / --user: Basic auth in username:password format. Converts to the Authorization: Basic header.
• -F / --form: Multipart form data — used for file uploads. Converts to FormData objects.
• -b / --cookie: Sends a cookie header. Each language has its own cookie mechanism.

Convert cURL to Code Instantly

Paste a cURL command into ToolsVito's cURL Converter — get idiomatic code in JavaScript fetch, Python requests, Go, PHP, Java, and more. All conversion happens in your browser.