In addition to a browser, there are several online tools that enable you to view source code of websites. These are helpful because most are formatted to stylize the code and highlight it to make it easier to read.
Jay Sawyer Northbrook There is a lot of HTML code that you can copy and paste into your own web pages and there are also available HTML code libraries and sample HTML pages.
There are other options to display the source code of a page, such as Inspect Elements, which allows you to open source code in a page window, select and highlight an element.