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Enter any URL. Get real Lighthouse scores for Performance, Accessibility, SEO, and Best Practices, plus Core Web Vitals (LCP, INP, CLS, FCP, TTFB). Powered by Google PageSpeed Insights. No AI, pure data.

Paste a foreground and background color. Instantly see pass/fail for WCAG 2.1 AA and AAA, for text, large text, and UI components. No AI needed.

Build multi-layer CSS box-shadows visually. Copy production-ready CSS or Tailwind config. Dark and light mode aware, no AI, no dependencies.

Enter a base size and ratio. Get a complete modular type scale with CSS custom properties, Tailwind classes, and preview. Pure math, zero AI.

Generate 5-color brand palettes from a seed. Every pairing is contrast-checked. Export as Tailwind, CSS vars, or Figma tokens.

Drop a URL or screenshot. Get a score across 5 metrics, prioritized findings with severity, and concrete fixes, benchmarked against 2,000 real pages.

Paste any product copy. Get Flesch-Kincaid, Gunning Fog, and SMOG readability scores. Know if your landing page copy lands at the right reading level.

Buttons, errors, empty states, tooltips, onboarding. Describe your UI context and get 3 conversion-optimized copy variants with rationale.

Select from pre-curated personas, by age, geography, role, and device type. Each AI agent reasons through your product as that specific user, delivering a structured usability report without scheduling a single session.

Define a base unit and scale factor. Get a complete spacing system exported as CSS tokens, Tailwind, or Figma-ready values. Pure math, zero AI.