1) Open Notepad (Windows -> Start -> Run -> notepad.exe)
2) Enter HTML, CSS code and save as <<filename>>.html (ex., helloworld.html).
3) Open HTML file (hellowworld.html) file using IE (Internet explorer) or Chrome or some other browsers (Select html file -> Right click -> Open With -> Choose Chrome/IE/other browser).
4) Result will be displayed.
Recommendations:
1) Use web design software to code HTML and CSS. Web design software gives better HTML and CSS help during code.
2) Few web design software are
a. Brackets (free open-source editor written in HTML, CSS, and JavaScript with a primary focus on Web Development).
b. Adobe Dreamweaver.
c. Visual Studio Community version (Free, fully-featured IDE for students, open-source and individual developers).