Tailwind Validator

The tool analyzes a Tailwind class string or small snippet, validates each utility against the active Tailwind catalog, and reports invalid utilities, misused prefixes, and variant ordering issues. It does not execute CSS; it focuses on correctness and consistency to support design-system compliance and safer upgrades across large codebases. It is intended for developers, design-system engineers, and code reviewers.
\n\nCore logic tokenizes by whitespace, recognizes responsive and state variants, and handles arbitrary values such as w-[75%]. It cross-checks each token with a versioned ruleset, flags deprecated or renamed utilities, and suggests canonical alternatives. It also detects conflicts when multiple padding or margin utilities could produce ambiguous results within a single class group.
\n\nBenefits include faster PR reviews, fewer runtime regressions, and a more predictable UI. Teams migrating to newer Tailwind versions or enforcing a strict design system gain confidence that utilities are used correctly and consistently. The tool emphasizes analysis over transformation, providing concrete guidance without modifying source code.
\n\nKey features include instant validation feedback, a structured issue list with token-level guidance, configurable rule sets, and the ability to export a summary for audits or PR notes. It supports offline catalogs and can adapt to different Tailwind versions to align with project lockfiles and CI validation.