Design Context — DESIGN.md & Tailwind v4 Extractor

Extract instant DESIGN.md specs, Tailwind v4 @theme, and design tokens from any website for Cursor and Claude Code.

🚀 Extract Design Systems, Tailwind v4 @theme, and AI Coding Context in seconds Design Context is a developer extension and design system extractor that turns any live website, local development server (localhost), or UI component into instant, production-grade design tokens, native Tailwind CSS v4 @theme configurations, W3C DTCG tokens.json, and hallucination-free prompts for modern AI coding assistants. One click from your browser's native Side Panel. Zero manual CSS inspection, zero color guesswork, and zero visual drift. 📸 CLEAN, ACCURATE DESIGN SYSTEM EXTRACTION Instead of spending hours picking hex codes and computing typographic scales in DevTools, Design Context captures the complete design language in under 100 milliseconds: • Native Tailwind CSS v4 @theme — Generates modern CSS-first theme blocks ready to drop directly into your global stylesheet without legacy tailwind.config.js • Perceptual Oklab Color Deduplication — Automatically clusters raw website colors into clean semantic roles (Primary, Secondary, Surface, Neutral, Accent, Border) using mathematical Oklab conversion (Delta E < 0.038) • Hallucination-Free AI Coding Context — Exports structured DESIGN.md and .cursorrules to ground AI coding agents with strict design constraints • W3C DTCG Token Standards — Generates standard tokens.json directly compatible with Figma Tokens Studio and native Figma Variables • Multi-Framework Component Inspector — Click any UI element (buttons, cards, navigation) to generate atomic React (TSX), Vue 3, Svelte 5, or HTML Tailwind components with 1-click Tailwind Play preview • WCAG 2.2 AA / AAA Accessibility Matrix — Real-time color contrast validation against background surfaces with downloadable PDF accessibility audit reports • Turnkey Design System ZIP Package — 1-Click download of complete design packages (YYYY-MM-DD_domain_design.zip) bundling theme CSS, tokens, markdown specs, cursorrules, and bulk SVG icons • 100% Client-Side & Localhost Ready — Runs offline in your browser sandbox; inspect http://localhost:3000 and private staging apps with zero data leaving your machine • Export History & File Organization — Track, search, and re-download past exports with clean date/domain filenames and subfolder nesting 🤖 SEAMLESS INTEGRATION WITH YOUR TOOLCHAIN Design Context is engineered to fit directly into your daily development and design workflows: • Export design tokens directly into Tailwind CSS v4 stylesheets or standard tokens.json files. • Generate component snippets tailored for modern frontend framework projects. • Ground AI coding workflows with structured DESIGN.md guidelines to prevent style hallucinations. • Sync token definitions with design variables and design system specifications. Eliminate the need for separate manual inspectors, color pickers, and accessibility tools. ⚡ FEATURES YOU'LL ACTUALLY USE • Instant Side Panel Docking — Inspect live sites and internal apps side-by-side without covering page content • 1-Click Clipboard Copy — Copy individual hex codes, font families, CSS custom properties, or complete @theme blocks in a single tap • Bulk SVG Icon Harvester — Locate all inline and embedded SVG icons across the page, preview them, and export as SVG files or React TSX icon components • Perceptual Color Palette Organizer — Collapses hundreds of redundant CSS colors into a cohesive 6-role semantic palette • Typography Modular Ramp — Identifies base font sizes, modular scale ratios, line heights, and font stacks • Fluid Spacing & Layout Geometry — Extracts padding, margin steps, border radii, and box-shadow elevations • Complete Project ZIP Bundle — Export a turnkey package ready to drop straight into any frontend codebase • Localhost & Staging Security — Inspect local dev servers (localhost:3000, 127.0.0.1) without security restrictions • Zero-Permission Export History — Search, filter, and re-download past design packages stored securely in your browser 🔄 HOW IT WORKS IN 3 STEPS 1. Open any live website or local development server (e.g. http://localhost:3000). 2. Open Design Context in Chrome's native Side Panel (or press Option+Shift+D / Alt+Shift+D). 3. Instantly copy your Tailwind v4 @theme, download the complete .zip project package, or copy DESIGN.md into your project root. 📊 HOW IT COMPARES | Capability | Chrome DevTools "Inspect" | Generic CSS Inspectors | Screenshot-to-Code AI | Design Context | | :--- | :---: | :---: | :---: | :---: | | Tailwind CSS v4 @theme | Manual copy of raw styles | Raw CSS snippet only | Guessed or broken utility classes | Native CSS-first @theme directive in 1 click | | Design System Tokens | Raw computed values | Unorganized hex lists | Inconsistent styles | W3C DTCG tokens.json for Figma Tokens Studio | | AI Coding Rules Context | None | None | None | Instant DESIGN.md and .cursorrules for AI agents | | Component Code Generation | Raw HTML/CSS snapshot | CSS block only | Layout shifts and broken responsiveness | Clean React TSX, Vue 3, Svelte 5 & HTML Tailwind | | Color Deduplication | 200+ redundant hex codes | 50+ duplicate swatches | Approximate color guesses | Perceptual Oklab clustering into 6 semantic roles | | Accessibility Validation | Manual contrast check | None | None | Automated WCAG 2.2 AA and AAA contrast matrix | | Turnkey Package Export | None | Individual files | None | Complete .zip with tokens, CSS, markdown and icons | | Localhost & Staging | Manual inspection | Works on some sites | Cannot access local dev servers | 100% local support for http://localhost:3000 | | Data Privacy & Telemetry | Local | Varies | Code and images uploaded to cloud | 100% local browser execution, zero telemetry | 🛠️ WHO IT'S FOR • Frontend Engineers & Developers — Upgrading projects to Tailwind CSS v4, reverse-engineering reference UI patterns, and eliminating repetitive styling setup. • AI-First Builders & Prompt Engineers — Grounding AI coding assistants with exact token definitions in DESIGN.md and .cursorrules to eliminate visual hallucinations. • Design System Architects & UI/UX Designers — Syncing live production code to Figma Variables and Figma Tokens Studio via W3C DTCG tokens.json. • Freelancers & Web Agencies — Auditing client web applications, generating WCAG 2.2 compliance reports, and extracting complete design assets for rapid redesigns. ☁️ FREE & PRO OPTIONS The Free version includes daily design system extractions so you can start inspecting and exporting right away. Free includes: • Daily design system scans on any website or localhost • Full Tailwind v4 @theme CSS generation and clipboard copy • Perceptual Oklab color palette clustering with hex/rgb/hsl • W3C DTCG tokens.json export • In-Page Component Inspector with React, Vue, Svelte, and HTML • WCAG 2.2 AA and AAA contrast ratio checks Pro adds: • Unlimited daily design system extractions • Turnkey Project .zip Bundle exports (YYYY-MM-DD_domain_design.zip) • Bulk SVG icon package extraction and downloads • Printable PDF accessibility audit reports • Advanced folder nesting and export history search • Priority feature updates and dedicated developer support ⭐ WHY DEVELOPERS USE DESIGN CONTEXT ✔ Blazing fast: Complete design system extraction in under 100 milliseconds ✔ Unobtrusive: Operates directly inside Chrome's native Side Panel alongside your work ✔ Modern standard: First-class support for Tailwind CSS v4 and W3C DTCG tokens ✔ AI-native: Directly feeds deterministic design context into Cursor and Claude Code ✔ 100% Private: Operates completely offline on your device with zero telemetry 🔒 BUILT WITH PRIVACY & LOCALHOST SECURITY IN MIND Your proprietary code, staging environments, and browsing activity belong to you: • All DOM analysis, Oklab clustering, and token formatting run locally in your browser's JavaScript engine • Works on internal dev servers (http://localhost:3000, 127.0.0.1) without exposing confidential code • No user accounts, logins, or tracking cookies required • Zero telemetry, zero analytics tracking, and zero cloud server storage ❓ FREQUENTLY ASKED QUESTIONS Can Design Context extract Tailwind CSS v4 @theme configurations? Yes! Design Context natively supports the Tailwind CSS v4 CSS-first architecture. It extracts computed colors, font families, modular spacing scales, and border radii into modern @theme directive blocks that you can paste directly into your main CSS stylesheet without configuring legacy tailwind.config.js files. How do DESIGN.md and .cursorrules help Cursor and Claude Code? AI coding assistants frequently hallucinate arbitrary hex colors, inconsistent margins, and incorrect font weights when writing frontend code. Placing DESIGN.md or .cursorrules in your project root grounds models like Claude 3.7 Sonnet, GPT-4o, and Cursor Composer with your exact design tokens, ensuring generated components match your brand perfectly. Can I import the extracted tokens into Figma? Yes! Design Context exports tokens in the official W3C Design Tokens Community Group (DTCG) standard format (tokens.json). You can import this file directly into the Figma Tokens Studio plugin or convert it into native Figma Variables. How does perceptual Oklab color deduplication prevent palette clutter? Most websites contain hundreds of tiny color variations caused by opacity shifts and legacy styles. Design Context uses the perceptually uniform Oklab color space and mathematical distance clustering (Delta E < 0.038) to consolidate duplicate shades into 6 core semantic roles: Primary, Secondary, Surface, Neutral, Accent, and Border. Does it work on localhost development servers and staging apps? Yes! Because Design Context executes 100% locally within your active browser tab, it works seamlessly on http://localhost:3000, http://127.0.0.1, and private intranet sites without sending any data over the internet. How does the Multi-Framework Component Inspector work? Activate the In-Page Component Inspector and click any UI element (such as a card, button, or navbar). Design Context analyzes the element's layout, hierarchy, and computed styles, synthesizing clean, production-ready components in React (TSX), Vue 3, Svelte 5, or standard HTML with Tailwind classes, complete with a 1-click Tailwind Play sandbox link. What is included in the Turnkey Design System ZIP Package? The Turnkey ZIP package (YYYY-MM-DD_domain_design.zip) contains an organized bundle ready for your repository: theme.css (Tailwind v4), tokens.json (W3C DTCG), DESIGN.md (AI prompt guidelines), .cursorrules (Cursor agent config), variables.css (vanilla CSS custom properties), and all extracted SVG / React TSX icons. Does Design Context validate WCAG 2.2 accessibility? Yes! Every extracted foreground color is checked against its background surface to calculate real-time contrast ratios according to WCAG 2.2 guidelines. The extension displays AA and AAA compliance badges for normal and large text, and Pro users can export a printable PDF accessibility audit report. How does Design Context compare to CSS Scan or CSS Peeper? While legacy CSS extensions only inspect single elements for raw computed styles, Design Context reverse-engineers the entire site's design system into structured tokens, synthesizes native Tailwind v4 @theme code, builds AI prompt grounding files (DESIGN.md and .cursorrules), and provides multi-framework component generation. Can I extract SVG icons from any page? Yes! Design Context automatically locates all inline and embedded SVG icons on the page, allowing you to preview, copy as React TSX components, or download the complete icon set as a ZIP package. Is my data uploaded to any remote servers? No. All DOM harvesting, style computation, color clustering, and token formatting happen locally on your computer. Your pages, code, and design tokens never leave your device. How do I search and manage my past design exports? Open Extension Options and switch to the History tab. You can search past exports by domain or filename, copy filenames with one click, re-download tokens or ZIP bundles, or organize exports into nested domain subfolders. Do I need an account to use Design Context? No account or sign-up is required. You can install the extension and immediately start extracting design systems for free. 📥 Install Design Context and transform any website into production-ready design tokens and AI coding context today.