WezTerm bundles JetBrains Mono, PowerlineExtraSymbols and Noto Color Emoji fonts and uses those for the default font configuration.

If you wish to use a different font face, then you can use the wezterm.font function to specify it:

local wezterm = require 'wezterm';

return {
  font = wezterm.font("Fira Code"),
  -- You can specify some parameters to influence the font selection;
  -- for example, this selects a Bold, Italic font variant.
  font = wezterm.font("JetBrains Mono", {weight="Bold", italic=true})
}

Fallback

WezTerm allows specifying an ordered list of fonts; when resolving text into glyphs the first font in the list is consulted, and if the glyph isn't present in that font, WezTerm proceeds to the next font in the fallback list.

The default fallback includes the popular PowerlineExtraSymbols font, which means that you don't need to use specially patched fonts to use the powerline glyphs.

You can specify your own fallback; that's useful if you've got a killer monospace font, but it doesn't have glyphs for the asian script that you sometimes work with:

local wezterm = require 'wezterm';
return {
  font = wezterm.font_with_fallback({
    "Fira Code",
    "DengXian",
  }),
}

WezTerm will still append its default fallback to whatever list you specify, so you needn't worry about replicating that list if you set your own fallback.

If none of the fonts in the fallback list (including WezTerm's default fallback list) contain a given glyph, then wezterm will resolve the system fallback list and try those fonts too. If a glyph cannot be resolved, wezterm will render a special "Last Resort" glyph as a placeholder. You may notice the placeholder appear momentarily and then refresh itself to the system fallback glyph on some systems.

Additional options for configuring fonts can be found elsewhere in the docs:

Troubleshooting Fonts

You may use wezterm ls-fonts to have wezterm explain information about which font files it will use for the different text styles.

It shows output like this:

$ wezterm ls-fonts
Primary font:
wezterm.font_with_fallback({
  -- /home/wez/.fonts/OperatorMonoSSmLig-Medium.otf, FontDirs
  {family="Operator Mono SSm Lig", weight="DemiLight"},

  -- /home/wez/.fonts/MaterialDesignIconsDesktop.ttf, FontDirs
  "Material Design Icons Desktop",

  -- /usr/share/fonts/jetbrains-mono-fonts/JetBrainsMono-Regular.ttf, FontConfig
  "JetBrains Mono",

  -- /usr/share/fonts/google-noto-emoji/NotoColorEmoji.ttf, FontConfig
  -- Assumed to have Emoji Presentation
  -- Pixel sizes: [128]
  "Noto Color Emoji",

  -- <built-in>, BuiltIn
  "Last Resort High-Efficiency",

})


When Intensity=Half Italic=true:
wezterm.font_with_fallback({
  -- /home/wez/.fonts/OperatorMonoSSmLig-BookItalic.otf, FontDirs
  {family="Operator Mono SSm Lig", weight=325, italic=true},

  -- /home/wez/.fonts/MaterialDesignIconsDesktop.ttf, FontDirs
  "Material Design Icons Desktop",

  -- /usr/share/fonts/jetbrains-mono-fonts/JetBrainsMono-Regular.ttf, FontConfig
  "JetBrains Mono",

  -- /usr/share/fonts/google-noto-emoji/NotoColorEmoji.ttf, FontConfig
  -- Assumed to have Emoji Presentation
  -- Pixel sizes: [128]
  "Noto Color Emoji",

  -- <built-in>, BuiltIn
  "Last Resort High-Efficiency",

})
...

You can ask wezterm to including a listing of all of the fonts on the system in a form that can be copied and pasted into the configuration file:

$ wezterm ls-fonts --list-system
<same output as above, but then:>
112 fonts found in your font_dirs + built-in fonts:
wezterm.font("Cascadia Code", {weight="ExtraLight", stretch="Normal", italic=false}) -- /home/wez/.fonts/CascadiaCode.ttf index=0 variation=1, FontDirs
wezterm.font("Cascadia Code", {weight="Light", stretch="Normal", italic=false}) -- /home/wez/.fonts/CascadiaCode.ttf index=0 variation=2, FontDirs
wezterm.font("Cascadia Code", {weight="DemiLight", stretch="Normal", italic=false}) -- /home/wez/.fonts/CascadiaCode.ttf index=0 variation=3, FontDirs
wezterm.font("Cascadia Code", {weight="Regular", stretch="Normal", italic=false}) -- /home/wez/.fonts/CascadiaCode.ttf index=0 variation=4, FontDirs
wezterm.font("Cascadia Code", {weight="DemiBold", stretch="Normal", italic=false}) -- /home/wez/.fonts/CascadiaCode.ttf index=0 variation=5, FontDirs
wezterm.font("Cascadia Code", {weight="Bold", stretch="Normal", italic=false}) -- /home/wez/.fonts/CascadiaCode.ttf index=0 variation=6, FontDirs
wezterm.font("Fira Code", {weight="Light", stretch="Normal", italic=false}) -- /home/wez/.fonts/FiraCode-Light.otf, FontDirs
wezterm.font("Fira Code", {weight="Regular", stretch="Normal", italic=false}) -- /home/wez/.fonts/FiraCode-Regular.otf, FontDirs
wezterm.font("Fira Code", {weight=450, stretch="Normal", italic=false}) -- /home/wez/.fonts/FiraCode-Retina.otf, FontDirs
wezterm.font("Fira Code", {weight="Medium", stretch="Normal", italic=false}) -- /home/wez/.fonts/FiraCode-Medium.otf, FontDirs
wezterm.font("Fira Code", {weight="Bold", stretch="Normal", italic=false}) -- /home/wez/.fonts/FiraCode-Bold.otf, FontDirs
wezterm.font("Font Awesome 5 Free", {weight="Black", stretch="Normal", italic=false}) -- /home/wez/.fonts/Font Awesome 5 Free-Solid-900.otf, FontDirs
...
690 system fonts found using FontConfig:
wezterm.font("Abyssinica SIL", {weight="Regular", stretch="Normal", italic=false}) -- /usr/share/fonts/sil-abyssinica-fonts/AbyssinicaSIL-R.ttf, FontConfig
wezterm.font("C059", {weight="Regular", stretch="Normal", italic=false}) -- /usr/share/fonts/urw-base35/C059-Bold.t1, FontConfig
wezterm.font("C059", {weight="Regular", stretch="Normal", italic=false}) -- /usr/share/fonts/urw-base35/C059-Roman.otf, FontConfig
wezterm.font("C059", {weight="Regular", stretch="Normal", italic=false}) -- /usr/share/fonts/urw-base35/C059-Roman.t1, FontConfig
wezterm.font("C059", {weight="Regular", stretch="Normal", italic=true}) -- /usr/share/fonts/urw-base35/C059-BdIta.t1, FontConfig
wezterm.font("C059", {weight="Regular", stretch="Normal", italic=true}) -- /usr/share/fonts/urw-base35/C059-Italic.otf, FontConfig
...

You may also display the shaping plan for a given text string; in this example, the a and the b are separated by a special symbol which is not present in the main font, so we expect to see a different font used for that glyph:

wezterm ls-fonts --text a🞄b
a    \u{61}       x_adv=8  glyph=29   wezterm.font("Operator Mono SSm Lig", {weight="DemiLight", stretch="Normal", italic=false})
                                      /home/wez/.fonts/OperatorMonoSSmLig-Medium.otf, FontDirs
🞄    \u{1f784}    x_adv=4  glyph=9129 wezterm.font("Symbola", {weight="Regular", stretch="SemiCondensed", italic=false})
                                      /usr/share/fonts/gdouros-symbola/Symbola.ttf, FontConfig
b    \u{62}       x_adv=8  glyph=30   wezterm.font("Operator Mono SSm Lig", {weight="DemiLight", stretch="Normal", italic=false})
                                      /home/wez/.fonts/OperatorMonoSSmLig-Medium.otf, FontDirs