How I convert a curl command into code I can actually use

API documentation often gives examples as curl commands:

curl -X POST https://api.example.com/users \
  -H "Authorization: Bearer TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"name":"Ana"}'

That is useful for testing, but eventually I need the same request in application code.

The curl Converter turns curl commands into JavaScript fetch, Axios, or Python requests code.

Step 1: read the URL

The URL is the endpoint being called:

https://api.example.com/users

If the URL contains query parameters, keep them:

https://api.example.com/users?active=true

A converted request should call the same URL.

Step 2: read the method

This flag sets the HTTP method:

-X POST

Common methods:

• GET: read data;
• POST: create or submit data;
• PUT: replace data;
• PATCH: update part of data;
• DELETE: delete data.

If there is a request body with -d, curl often uses POST even without -X POST. Still, I prefer making the method explicit in code.

Step 3: read the headers

Headers use -H:

-H "Authorization: Bearer TOKEN"
-H "Content-Type: application/json"

In code, these become a headers object or dictionary.

For fetch:

headers: {
  Authorization: 'Bearer TOKEN',
  'Content-Type': 'application/json'
}

Be careful with real tokens. Do not hard-code production secrets into frontend code.

Step 4: read the body

The body often uses -d:

-d '{"name":"Ana"}'

For JSON APIs, code usually sends a JSON string.

Fetch example:

body: JSON.stringify({ name: 'Ana' })

The Content-Type: application/json header tells the server how to read it.

Step 5: paste into the converter

Open curl Converter, paste the command, and choose the output language.

Then review the generated code. A converter can translate structure, but you still need to decide where tokens, URLs, and variables should come from in your app.

Step 6: replace example secrets with variables

Documentation often uses placeholders like:

TOKEN
API_KEY
SECRET

In real code, replace those with configuration:

const token = process.env.API_TOKEN;

Do not commit secrets to Git.

Step 7: test the converted request

After converting, test with a safe environment:

• local server;
• sandbox API;
• staging environment;
• a test account.

Check:

• status code;
• response body;
• headers;
• error handling;
• timeout behaviour.

My curl conversion checklist

When converting curl to code, I check:

1. Is the URL the same?
2. Is the HTTP method correct?
3. Are all headers included?
4. Is the body encoded correctly?
5. Are secrets replaced with variables?
6. Is this safe to run against the selected environment?
7. Did I add error handling after the basic request works?

The converter saves typing, but I still read the result. API calls are small, but they often carry important credentials and side effects.