designlang is an open-source CLI that crawls any live website with a headless browser and emits its complete design system: W3C DTCG tokens (primitive, semantic, composite), Tailwind config, CSS variables, Figma variables, shadcn/ui theme, plus native emitters for iOS SwiftUI, Android Jetpack Compose, Flutter and WordPress, and a print-ready brand-book PDF. It runs locally and ships an MCP server so Claude Code, Cursor and Windsurf can read live extractions as native tools.

How do I install designlang?

Run `npx designlang ` — no install, no account, no API key. The package is on npm as `designlang` and requires Node.js 20 or later. The full source is on GitHub at github.com/Manavarya09/design-extract under the MIT licence.

How is designlang different from Style Dictionary, Tokens Studio, Subframe, v0 and Builder.io?

Those tools take a Figma file or hand-authored tokens as input. designlang takes a live URL. It reads what your browser actually computes — colours, spacing, typography, motion, shadows, anatomy — directly from the rendered DOM. It outputs strict W3C DTCG with proper primitive / semantic / composite layering, runs a CSS health audit, performs WCAG remediation, and ships multi-platform emitters from one run.

Does designlang work with Claude Code, Cursor and Windsurf?

Yes. designlang ships a stdio MCP server (`designlang mcp`) that exposes extracted tokens, semantic regions, component clusters, CSS health and accessibility remediation as MCP resources and tools. The CLI also auto-generates `.cursor/rules/designlang.mdc`, `.claude/skills/designlang/SKILL.md`, `CLAUDE.md` fragments and `AGENTS.md` so any AI coding agent can read the system natively.

Is designlang free and open source?

Yes. designlang is MIT-licensed and fully open source on GitHub. The CLI is free with no signup. The hosted demo at designlang.app is rate-limited to two extractions per IP per day; the CLI is unlimited.

What output formats does designlang support?

W3C DTCG JSON, Tailwind CSS config, CSS custom properties, Figma Variables JSON, shadcn/ui theme, React / Vue / Svelte theme objects, iOS SwiftUI extensions, Android Compose Theme.kt + colors.xml, Flutter ThemeData, WordPress block theme (theme.json + style.css), agent rules (AGENTS.md, .cursorrules, Claude skills, MCP), motion tokens, typed component anatomy stubs, a brand voice/CTA pack, and a print-ready brand-book PDF with chapter bookmarks and an embedded tokens attachment.

Can I generate a brand-book PDF for any URL?

Yes. `npx designlang brand --pdf` produces a 13-chapter brand-guidelines PDF with chapter page breaks, a running footer, an extracted-primary cover band, and (with `--attach-tokens`) the DTCG tokens JSON embedded as a PDF file attachment.

Does designlang extract motion, hover states and interaction design?

Yes. With the `--interactions` flag designlang captures hover, focus and active states for buttons, links and inputs, and reads all CSS transitions, easing functions and `@keyframes` animations into a motion-tokens DTCG file.

Watch the browser read a site

Real headless Chromium opens the page and reads its design system in real time. Your first run is free when you sign in. Then share the result.

Try

stripe.comSample result

Söhne, weight 300stripe.com

Financial infrastructure to grow your revenue.

Read by designlang. Colours, type and spacing as extracted.

Colour8

#533afd
#061b31
#0d1738
#64748d

Type

AgSöhne, 300

Spacing7

28 32 40 48 64 80 96

29colours13spacing stepsBgrade, 88/100

Page
Colour
Type
Spacing
Shadows
Radii
Components
Regions
Contrast
Score