Sure, here are some popular online platforms that offer courses in front-end development:

Udemy - offers a wide range of courses in front-end development, both paid and free.

Coursera - offers a variety of courses from top universities and institutions in front-end development, including full specializations that can be pursued for a fee.

Pluralsight - is a paid platform that offers a comprehensive library of front-end development courses.

LinkedIn Learning (formerly Lynda) - is a paid platform with a wide range of front-end development courses.

Codecademy - offers a comprehensive curriculum in front-end development, both free and paid.

FreeCodeCamp - is a non-profit platform that offers a comprehensive curriculum in front-end development, as well as full-stack development, completely free.

I hope these options help you in finding the right course to start your front-end development journey. Regardless of the platform you choose, be sure to read reviews, compare course offerings, and choose the course that best fits your needs and learning style.