Container Query Playground
Interactive demo of CSS container queries. Resize the container (not viewport) and watch the layout respond. Set custom breakpoints. Copy the @container CSS.
Color Accessibility Checker
Full accessibility analysis: WCAG AA/AAA contrast ratios PLUS color blindness simulation (protanopia, deuteranopia, tritanopia). See how your color combo looks to colorblind users.
481 tools: devtools-site-delta.vercel.app
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