Question 1

What is a curl command?

Accepted Answer

curl is a command-line tool for making HTTP requests. You paste a URL (and optional flags) and it fetches the resource. Developers use it to test APIs, download files, and debug network issues.

Question 2

How do I explain a curl command?

Accepted Answer

Paste your curl command into curlwtf.com and click Explain. You'll get a plain-English breakdown of every flag, what the endpoint does, security warnings for any leaked credentials, and code equivalents in Python, JavaScript, and Go.

Question 3

What does curl -X mean?

Accepted Answer

curl -X sets the HTTP method. For example, -X POST sends a POST request instead of the default GET. Common values are GET, POST, PUT, PATCH, and DELETE.

Question 4

What does curl -H mean?

Accepted Answer

curl -H adds a custom HTTP header to the request. For example, -H "Authorization: Bearer token123" sends an authentication token, and -H "Content-Type: application/json" tells the server you're sending JSON.

Question 5

What does curl -d mean?

Accepted Answer

curl -d sends data in the request body, typically for POST requests. For example, -d '{"name":"alex"}' sends a JSON payload. It automatically sets the HTTP method to POST if -X is not specified.

Question 6

How do I convert curl to Python?

Accepted Answer

Paste your curl command into curlwtf.com. The result panel includes a Python tab with a ready-to-run equivalent using the requests library, with credentials stored in environment variables.

Question 7

What does curl -k or --insecure mean?

Accepted Answer

curl -k (or --insecure) disables SSL/TLS certificate verification. This is a security risk because it allows man-in-the-middle attacks. It's sometimes used for testing against local servers with self-signed certificates, but should never be used in production.

Question 8

Is curlwtf free to use?

Accepted Answer

Yes. You get 1 free explanation per day without an account, and 3 per day with a free account. The Pro plan ($7/month) gives you unlimited explanations using GPT-4o.

$ WTF does this curl do