WhatTheCSS
WhatTheCSS is a Chrome extension for designers and front-end developers that lets you hover over any element on a website to instantly see its authored CSS. Key features include: - Hover-to-inspect: View real declarations, pseudo-classes, and variables as you move your cursor. - Peek mode: Toggle with V to see type, colors, and WCAG contrast. - Live editing: Press Space to freeze an element into a four-tab editor (CSS, Contrast, Box, and Tree) where you can test changes live.
WhatTheCSS
WhatTheCSS is a Chrome extension for designers and front-end developers that lets you hover over any element on a website to instantly see its authored CSS. Key features include: - Hover-to-inspect: View real declarations, pseudo-classes, and variables as you move your cursor. - Peek mode: Toggle with V to see type, colors, and WCAG contrast. - Live editing: Press Space to freeze an element into a four-tab editor (CSS, Contrast, Box, and Tree) where you can test changes live.
Ranked #7196 on TrustMRR
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Sandipan Mukherjee2,200 followers on 𝕏
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DodoPayment API key.Last updated: Sep 18, 2026, 12:50 AM
Hover any element on any website. See its CSS.
Provides designers and front-end developers with an instant tooltip showing the actual authored CSS of any web element, avoiding the longhand mess shown by DevTools.
Audience
Designers and front-end developers
Pricing
Free: $0 forever, Pro: $19 one-time
Domain Rating
whatthecss.dev
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