Character encodings in HTML

For a list of character entity references, see List of XML and HTML character entity references.
For fixing links within Wikipedia, see Help:Percent-encoding § Fixing Links with Unsupported Characters.

HTML
Comparisons

While Hypertext Markup Language (HTML) has been in use since 1991, HTML 4.0 from December 1997 was the first standardized version where international characters were given reasonably complete treatment. When an HTML document includes special characters outside the range of seven-bit ASCII, two goals are worth considering: the information's integrity, and universal browser display.