An HTML editor is a computer program for editing HTML, the markup of a webpage.Although the HTML markup of a web page can be written with any text editor ,specialized HTML editors can offer convenience and added functionality.

For example,
many HTML editors handle not only HTML but also related technologies such as CSS,XML, JavaScript or ECMAScript

Some of the most popular text editors for HTML are:
● Atom
● Brackets
● Sublime Text
● Visual Studio Code