Slab serif web design features typefaces with thick, block-like serifs that project strength, stability, and a bold mechanical presence. These robust letterforms stand out in headlines, lending a confident, grounded quality that bridges the warmth of serifs with the impact of bold sans-serifs.
Slab serifs have thick, rectangular terminal strokes with minimal or no bracketing connecting them to the main stroke. They evolved from early 19th-century advertising type and carry connotations of industrial strength, reliability, and forthright communication.
Roboto Slab, Zilla Slab, and Bitter are widely used free options. On the premium side, Sentinel, Rockwell, and Clarendon are classics, while more contemporary choices like Adelle and Museo Slab offer versatility from body text through to headline sizes.