curlcode blog
cURL tutorials, API request guides, and conversion tips
Practical developer guides for understanding cURL, debugging HTTP requests, and turning working curl commands into code.
cURL basics
What does cURL mean?
Learn what cURL means, why developers use it, and how a simple curl command turns a URL into a repeatable API request.
cURL basics
What is a cURL command?
A practical explanation of curl commands, their structure, common flags, and how developers use them to test APIs.
DevTools
How to copy as cURL from Chrome DevTools
Use Chrome DevTools to copy a real browser request as cURL, inspect headers and cookies, and convert it into reusable code.
HTTP requests
How to send a POST request with JSON using cURL
Learn how to send JSON with curl using POST, Content-Type headers, and request bodies that APIs can parse correctly.
HTTP requests
How to add headers to a cURL request
Learn how curl headers work, when to use -H, and how headers translate into Python, JavaScript, Node, and other HTTP clients.
Authentication
How to use Bearer token authentication with cURL
Send authenticated API requests with curl using Authorization: Bearer tokens and learn how to convert them safely into code.
Conversion guides
How to convert cURL to Python requests
Convert curl commands to Python requests code while preserving methods, headers, query strings, JSON bodies, and authentication.
Conversion guides
How to convert cURL to JavaScript fetch
Translate curl commands into JavaScript fetch code for browsers, Node.js 18+, serverless functions, and edge runtimes.
Comparisons
cURL vs Postman: when should you use each?
Compare curl and Postman for API testing, debugging, sharing requests, automation, and converting API examples into code.
Troubleshooting
Common cURL errors and how to fix them
Troubleshoot common curl problems including quoting errors, SSL issues, auth failures, redirects, JSON mistakes, and shell differences.