Zilla Slab

Light

Italic

300

Regular

Italic

400

Medium

Italic

500

Semi-Bold

Italic

600

Bold

Italic

700

Characters

Aa
Bb
Cc
Dd
Ee
Ff
Gg
Hh
Ii
Jj
Kk
Ll
Mm
Nn
Oo
Pp
Qq
Rr
Ss
Tt
Uu
Vv
Ww
Xx
Yy
Zz
Åå
Ææ
Çç
Éé
Øø
Ññ
Üü
Žž
1234567890
‘¿?’
“!”
- – —
(&)
[*]
{@}
€£¥$¢
:;,.
<>+÷×=

Zilla Slab was summoned into existence through an unprecedented public ritual: Mozilla’s radical "Open Design" rebrand of 2017, orchestrated alongside the design studio Johnson Banks and entrusted to the adept hands of Peter Biľak and Nikola Djurek at Typotheque. Emerging from the refined structural chassis of Typotheque’s earlier Tesla, the typeface was drafted to personify the foundational spirit of the open web—a territory suspended between the austere logic of network protocols and the unruly democracy of human communication. In an institutional identity whose very wordmark was famously fused with the punctuation of a URL scheme (moz://a), Zilla Slab arrived not as proprietary corporate armor, but as an open-source civic utility: an honest, contemporary slab serif gifted to the digital commons under the SIL Open Font License.

Anatomically, the design reinterprets the nineteenth-century Egyptian vernacular through the lens of modern digital ergonomics. Where early industrial slabs often marched with the deafening, unyielding rigidity of the steam-driven press, Zilla Slab tempers structural force with approachable human warmth. Its serifs are resolute, unbracketed horizontal blocks that anchor characters firmly against the baseline like dressing stones in an aqueduct; yet within this tectonic framework, the inner arches and junctions curve with a supple, organic elasticity. The x-height is generously scaled, and the apertures remain wide and hospitable, inviting ambient light into the interior chambers of each glyph to ensure that dense alphanumeric strings, code snippets, and headlines remain transparent across coarse raster displays. On the screen, it casts a crisp, industrious color—authoritative without turning brutalist, and candid without lapsing into colloquial slop.

Typographically, the family refuses the mechanical shortcuts so frequently inflicted upon utilitarian display faces. In place of a perfunctory slanted oblique, Biľak and Djurek furnished the family with true cursive italics, whose dynamic entry strokes and chirographic exits introduce a spirited, conversational counterpoint alongside the upright roman. Expanding across five finely calibrated weights—and enriched by the theatrical verve of Zilla Slab Highlight, which captures the blunt friction of an editorial highlighter across printed proof-sheets—the family operates with remarkable adaptability. In the open commons, Zilla Slab stands as an enduring monument to Mozilla’s founding ethos: an alphabet proving that the raw, engineered machinery of the internet can dwell in seamless harmony with the ancient, hospitable dignity of the book arts.

Words

Questography

difficult waffles

Havana Plywood

Château d’Yquem

Högertrafikomläggningen

hamburgevontpids

Headlines

Light · 300

Brawny gods just flocked up to quiz and vex him

Light Italic · 300

Brawny gods just flocked up to quiz and vex him

Light Small Caps · 300

Brawny gods just flocked up to quiz and vex him

Regular · 400

Amazingly few discotheques provide jukeboxes

Regular Italic · 400

Amazingly few discotheques provide jukeboxes

Regular Small Caps · 400

Amazingly few discotheques provide jukeboxes

Medium · 500

Why shouldn’t a quixotic Kazakh vampire jog barefoot?

Medium Italic · 500

Why shouldn’t a quixotic Kazakh vampire jog barefoot?

Medium Small Caps · 500

Why shouldn’t a quixotic Kazakh vampire jog barefoot?

Semi-Bold · 600

Grumpy wizards make a toxic brew for the jovial queen

Semi-Bold Italic · 600

Grumpy wizards make a toxic brew for the jovial queen

Semi-Bold Small Caps · 600

Grumpy wizards make a toxic brew for the jovial queen

Bold · 700

Jackie will budget for the most expensive zoology equipment

Bold Italic · 700

Jackie will budget for the most expensive zoology equipment

Bold Small Caps · 700

Jackie will budget for the most expensive zoology equipment

Paragraphs

With matted beard, and swathed in a bristling shark-skin apron, about mid-day, Perth was standing between his forge and anvil, the latter placed upon an iron-wood log, with one hand holding a pike-head in the coals, and with the other at his forge’s lungs, when Captain Ahab came along, carrying in his hand a small rusty-looking leathern bag. While yet a little distance from the forge, moody Ahab paused; till at last, Perth, withdrawing his iron from the fire, began hammering it upon the anvil—the red mass sending off the sparks in thick hovering flights, some of which flew close to Ahab. “Are these thy Mother Carey’s chickens, Perth? they are always flying in thy wake; birds of good omen, too, but not to all;—look here, they burn; but thou—thou liv’st among them without a scorch.” “Because I am scorched all over, Captain Ahab,” answered Perth, resting for a moment on his hammer; “I am past scorching; not easily can’st thou scorch a scar.” “Well, well; no more. Thy shrunk voice sounds too calmly, sanely woeful to me. In no Paradise myself, I am impatient of all misery in others that is not mad. Thou should’st go mad, blacksmith; say, why dost thou not go mad? How can’st thou endure without being mad? Do the heavens yet hate thee, that thou can’st not go mad?—What wert thou making there?”

With matted beard, and swathed in a bristling shark-skin apron, about mid-day, Perth was standing between his forge and anvil, the latter placed upon an iron-wood log, with one hand holding a pike-head in the coals, and with the other at his forge’s lungs, when Captain Ahab came along, carrying in his hand a small rusty-looking leathern bag. While yet a little distance from the forge, moody Ahab paused; till at last, Perth, withdrawing his iron from the fire, began hammering it upon the anvil—the red mass sending off the sparks in thick hovering flights, some of which flew close to Ahab. “Are these thy Mother Carey’s chickens, Perth? they are always flying in thy wake; birds of good omen, too, but not to all;—look here, they burn; but thou—thou liv’st among them without a scorch.” “Because I am scorched all over, Captain Ahab,” answered Perth, resting for a moment on his hammer; “I am past scorching; not easily can’st thou scorch a scar.” “Well, well; no more. Thy shrunk voice sounds too calmly, sanely woeful to me. In no Paradise myself, I am impatient of all misery in others that is not mad. Thou should’st go mad, blacksmith; say, why dost thou not go mad? How can’st thou endure without being mad? Do the heavens yet hate thee, that thou can’st not go mad?—What wert thou making there?”

With matted beard, and swathed in a bristling shark-skin apron, about mid-day, Perth was standing between his forge and anvil, the latter placed upon an iron-wood log, with one hand holding a pike-head in the coals, and with the other at his forge’s lungs, when Captain Ahab came along, carrying in his hand a small rusty-looking leathern bag. While yet a little distance from the forge, moody Ahab paused; till at last, Perth, withdrawing his iron from the fire, began hammering it upon the anvil—the red mass sending off the sparks in thick hovering flights, some of which flew close to Ahab. “Are these thy Mother Carey’s chickens, Perth? they are always flying in thy wake; birds of good omen, too, but not to all;—look here, they burn; but thou—thou liv’st among them without a scorch.” “Because I am scorched all over, Captain Ahab,” answered Perth, resting for a moment on his hammer; “I am past scorching; not easily can’st thou scorch a scar.” “Well, well; no more. Thy shrunk voice sounds too calmly, sanely woeful to me. In no Paradise myself, I am impatient of all misery in others that is not mad. Thou should’st go mad, blacksmith; say, why dost thou not go mad? How can’st thou endure without being mad? Do the heavens yet hate thee, that thou can’st not go mad?—What wert thou making there?”

Size128

Standard Ligatures

font-feature-settings: 'liga';

ffff
ffiffi
fflffl
fifi
flfl

Figures

H1234567890

Proportional Oldstyle (default)

H1234567890

Proportional Lining: 'lnum'

H1234567890

Tabular Lining: 'lnum', 'tnum'

H1234567890

Tabular Oldstyle: 'onum', 'tnum'

1/2 3/4

Fractions: 'frac'

H0

Slashed Zero: 'zero'

H123

Numerators: 'numr'

H123

Denominators: 'dnom'

H123

Scientific Inferiors: 'sinf'

H123

Superscripts: 'sups'

Ordinals

font-feature-settings: 'ordn';

1st1st
3a3a

Case Sensitive Forms

font-feature-settings: 'case';

h‰‹›€hh‰‹›€h

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