Lucide, Tabler, and Phosphor: A Data-Driven Comparison of Free Icon Libraries
Lucide, Tabler Icons, and Phosphor are three widely used open-source icon libraries, each with distinct design philosophies and coverage. Lucide and Tabler both use a 24x24 stroke-based grid with 1,778 and 6,143 icons respectively, while Phosphor uses filled paths on a 256x256 grid and offers 9,161 icons across six weight variants. When measured by unique icon concepts rather than total count, Tabler leads in distinct coverage, and Phosphor's tally is inflated by its six-weight system. All three libraries are permissively licensed — Tabler and Phosphor under MIT, Lucide under the functionally similar ISC — with no attribution required for commercial use. Designers are advised to audit coverage for niche-domain needs before committing to a library, as breadth varies significantly across specialized categories.
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