Unicode Popularity: How Popular is UTF-8?

By Xah Lee. Date: 2010-01-29. Last updated: 2020-01-26.

Utf-8 Usage on the Web

2010 → 50.6%
2011 → 59.8%
2012 → 68.0%
2013 → 74.7%
2014 → 78.7%
2015 → 82%
2016 → 87.2%
2017 → 88.2%
2018 → 90.5%
2019 → 94.6%
2020-01 → 94.8%

Source: http://w3techs.com/technologies/history_overview/character_encoding/ms/y

The following is 2001 to 2010.

unicode on web — Unicode use on the web. [Unicode nearing 50% of the web 2010-01-28. By Mark Davis, Senior International Software Architect at Google. At http://googleblog.blogspot.com/2010/01/unicode-nearing-50-of-web.html ]

See also: Unicode Basics: Character Set, Encoding, UTF-8

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