How to Fix Laravel 12 CORS Error: No ‘Access-Control-Allow-Origin’ Header is Present

Introduction

If you're using Laravel 12 to build APIs for a frontend app like React, Vue, or Angular, you might run into a common problem:

"There is no 'Access-Control-Allow-Origin' header on the resource you asked for."

This is a Cross-Origin Resource Sharing (CORS) error. It usually happens when your front end and back end are on different ports or domains. Laravel 12 says it has built-in CORS support, but many developers still have problems because they haven't set it up correctly or have missed steps.

This guide will show you how to fix and debug CORS problems in Laravel 12 the right way.