Fetch to cURL Converter
Convert JavaScript fetch() calls to equivalent cURL commands.
About this tool
The Fetch to cURL Converter transforms JavaScript fetch() calls into equivalent cURL command-line statements. This tool bridges the gap between modern web development and command-line debugging, making it easier to test APIs, reproduce network issues, and share requests across different environments. Whether you're debugging a failed API call or documenting an HTTP request for your team, converting between these two formats saves time and reduces manual transcription errors.
To use the converter, paste your JavaScript fetch() code into the input area and click the Convert button. The tool instantly translates the fetch syntax—including headers, request body, authentication tokens, and HTTP methods—into the equivalent cURL format. You can then copy the resulting cURL command and execute it directly in your terminal, Postman, or other HTTP testing tools. This makes it simple to verify that your API requests work identically across different platforms and debugging contexts.
The converter handles common fetch patterns including JSON payloads, form data, custom headers, and various HTTP methods (GET, POST, PUT, DELETE, PATCH). This tool is invaluable for developers, DevOps engineers, and API maintainers who frequently move between frontend code and command-line utilities. By eliminating the manual conversion step, you can focus on solving actual problems rather than rewriting request syntax.
Frequently Asked Questions
Code Implementation
import requests
import subprocess
# Python requests equivalent of fetch()
# fetch("https://api.example.com/users", { method: "GET" })
response = requests.get("https://api.example.com/users",
headers={"Authorization": "Bearer mytoken"})
# Convert to equivalent cURL command string
def requests_to_curl(method, url, headers=None, data=None):
parts = ["curl", "-X", method.upper()]
if headers:
for k, v in headers.items():
parts += ["-H", f"'{k}: {v}'"]
if data:
import json
parts += ["-d", f"'{json.dumps(data)}'"]
parts.append(f"'{url}'")
return " ".join(parts)
# Example
curl_cmd = requests_to_curl(
"POST",
"https://api.example.com/users",
headers={
"Content-Type": "application/json",
"Authorization": "Bearer abc123",
},
data={"name": "Alice", "email": "alice@example.com"},
)
print(curl_cmd)Comments & Feedback
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