Want skills need to become web developer in future??

Answer 1

There are many different technologies present which can be used for web development. It is up to you which one to choose.
Frontend:
1) HTML
2) CSS
3) jQuery
4) JavaScript / Angular.js

Backend:
1) PHP (widely used)
2) Ruby on rails
3) Node.js
4) Java
5) Python

Database:
1) MySQL
2) MongoDB

Answer 2

HTML, CSS, PHP or JavaScript and maybe Java