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Technologies > Site Elements > CSS > External CSS > by Character Encodings

Usage of External CSS as site element broken down by character encodings

This diagram shows the percentages of websites using External CSS broken down by character encodings. See technologies overview for explanations on the methodologies used in the surveys.

How to read the diagram:
External CSS is used by 88.9% of all the websites.
External CSS is used by 89.2% of all the websites that use UTF-8 as character encoding.

Overall

88.9%

89.2%

80.5%

63.8%

89.7%

96.5%

89.6%

67.1%

87.5%

79.7%

84.7%

65.8%

92.7%

89.2%

69.3%

90.0%

79.4%

77.1%

71.0%

81.6%

85.1%

81.5%

68.3%

93.2%

89.8%

69.1%

71.1%

92.5%

75.8%

60.3%

40.4%

81.9%

76.7%

93.0%

85.0%

85.7%

81.8%

89.5%

ANSI_X3.110-1983

37.5%

76.9%

75.0%

70.0%

W3Techs.com, 21 November 2025

Percentages of websites using External CSS broken down by character encodings

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Technology Brief
External CSS
Category: Site Elements
External Cascading Style Sheets define style rules in a separate CSS file.

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