W3.CSS Fonts

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Verdana is the default font used in W3.CSS. Verdana has a good letter spacing, and is easy to read. Verdana is also the default font for W3Schools.

Segoe UI is the default font for headings. Segoe UI has a more narrow letter spacing. This allows for a few more letters in the headings.

Using Another Default Font

Using another default font in W3.CSS is very easy:

Example

body, h1, h2, h3, h4, h5, h6 {
font-family: Arial, Helvetica, sans-serif;
}

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Using Font Classes

With W3.CSS you can use 4 different built-in font classes:

w3-serif
w3-sans-serif
w3-monospace
w3-cursive

This is w3-serif

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Example

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This is w3-sans-serif

Example

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This is w3-monospace

Example

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This is w3-cursive

Example

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Web Safe Sans Serif Fonts

Font Family	Safe Fallback
Arial	Helvetica, sans-serif
Helvetica	Arial, sans-serif
Verdana	Geneva, sans-serif
Geneva	Verdana, sans-serif
Tahoma	Arial, sans-serif
Trebuchet MS	Arial, sans-serif

Arial is considered the safest sans-serif font on the web. It is installed on all Windows machines (99.8%) and all Mac machines (98.7%).

Helvetica is the preferred fallback because the two fonts are almost identical. Helvetica runs on all Mac machines (100%) but on fewer Windows machines (7.3%).

Using Arial with Helvetica fallback, or Helvetiva with Arial fallback, covers both worlds.

Verdana is also considered to be a web safe sans-serif font. It runs on all Windows machines (99.8%), and all Mac Machines (99.1%).

Geneva is Verdanas preferred fallback, because the two fonts are quite similar, and Geneva runs on all Mac machines (99.6%).

Tahoma was the standard font in Windows 95. It works on 99.9% of all Windows machines, and 91.7% of all Mac machines.

Trebuchet MS has been released with all Windows operating systems (99.7%) since Microsoft Windows 2000. It is also included on Macs machines (97.1%), iOS and Chrome OS.

Source: CSS Font Stack

This is Arial

Example

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Arial is ranked #1 in use on the Web.

This is Helvetica

Example

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Helvetica is ranked #2 in use on the Web.

This is Verdana

Example

body, h1, h2, h3, h4, h5, h6 {
font-family: Verdana, Geneva, sans-serif;
}

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Verdana is ranked #3 in use on the Web.

This is Geneva

Example

body, h1, h2, h3, h4, h5, h6 {
font-family: Geneva, Verdana, sans-serif;
}

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This is Tahoma

Example

body, h1, h2, h3, h4, h5, h6 {
font-family: Tahoma, "Trebuchet MS", sans-serif;
}

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This is Trebuchet MS

Example

body, h1, h2, h3, h4, h5, h6 {
font-family: "Trebuchet MS", Tahoma, sans-serif;
}

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This is Segoe UI

Example

body, h1, h2, h3, h4, h5, h6 {
font-family: "Segoe UI", Arial, sans-serif
}

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Segoe UI is the default font in Windows 10. It is also the default heading font in W3Schools an W3.CSS.

Web Safe Serif Fonts

Font Family	Safe Fallback
Times New Roman	Times, serif
Georgia	serif

Times New Roman is considered the most web safe serif font. It works on all Windows machines (99.7%) and all Mac machines (97.4%).

Some older operating systems might have an alternative version called Times, so it is smart to use Times as a fallback as well as serif.

Georgia is also considered very safe. It is a little larger than Times New Roman, but works well on most Windows machines (99.4%) and Mac machines (97.5%).

To be on the safe side, use serif as fallback.