How to encrypt HTML codes ?

Question

nobody could change and read anything

Answer 1

You can't do it. If you want to encrypt your data you can use PHP, JS, etc.

Btw, the markup of your page will always be visible, but it doesn't mean that the source code can be edited.

Answer 2

You cannot encript the html code itself. It will always be visible once a site is online, since browsers need the bare code for interpreting. If you need code like user data management, password hash etc. then use php, as that is server side code invisible for users.