Heroicons is the official, MIT-licensed icon library (300+ icons) from the Tailwind CSS team, hand-crafted by Steve Schoger, offered in four styles: Outline, Solid, Mini, and Micro.
The four size- and weight-matched styles, down to a dedicated 16px Micro variant, are purpose-built for different UI densities, avoiding the artifacts of manually scaling one style to every size.
Good default choice for Tailwind CSS projects, or any interface wanting a clean, actively maintained icon set with a genuinely optimized small-size variant.
Free and MIT licensed, no attribution required; ships as SVG plus React and Vue component libraries, and an official Figma file.
