Chrome extension · No API key required
Design Catcher reads the page you're on — DOM, computed styles, CSS variables, and layout — then writes a portable 3-file bundle your coding agent can follow to match the same look and feel.
Community cache
Search and filter by page type, industry, or layout pattern. Each capture links to the live site and its design bundle.
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THE ULTIMATE
Driving machine
DESIGN.mdSTRUCTURE.mdUI-KIT.mdWhy Design Catcher
Tools like Impeccable generate portable design docs for AI agents — but only from projects you already own. Design Catcher closes the gap: point at any live URL and export the same structured bundle, ready for your agent. Learn about Impeccable.
Everything you need
Stop screenshotting and guessing tokens. Get structured markdown that mirrors how Impeccable and Google Stitch document design systems — sourced from any URL you visit.
Colors, typography, spacing, radius, shadows, and component patterns — extracted deterministically from computed styles and CSS variables, then refined by Gemini into token refs like `{colors.primary}` and `{spacing.section}`.
Hero blocks, nav patterns, section rhythm, carousels, scroll behavior, and motion — so your agent rebuilds layout and hierarchy, not just colors.
Maps detected patterns to shadcn/ui, Aceternity, Magic UI, 21st.dev, and more — so agents pick the right primitives instead of reinventing buttons.
First capture of a domain runs on Gemini in the cloud. Every visit after that loads the bundle from cache in seconds — same three files, no duplicate LLM spend.
Real captures
Browse the community gallery. Each bundle links back to the live URL it was captured from.
Your capture bundle
Save the bundle beside your codebase or paste sections into Cursor, Claude Code, or Codex — the same schema every time.
DESIGN.md
Tokens, colors, type scale, components
STRUCTURE.md
Sections, hero, motion, carousels
UI-KIT.md
shadcn, Aceternity, Magic UI mappings
How it works
Open the page you want to replicate — landing page, dashboard, or marketing site.
The extension extracts facts from the DOM, then cloud LLM synthesizes your three markdown files.
Drop the bundle into your repo root or agent prompt. Build with confidence — same visual language, your stack.
Built for builders
"I used to screenshot Stripe and guess spacing. Now I capture once and Cursor follows DESIGN.md — shipped a pricing page in an afternoon."
"STRUCTURE.md is the missing piece. Agents finally respect section order and carousel behavior instead of flattening everything."
"Community cache means revisiting apple.com doesn't burn another generation. The extension feels instant on repeat domains."
And more
DOM, computed styles, CSS variables, page sections, animations, and carousels — facts before the LLM writes a word.
Tab between Design, Structure, and UI Kit. Copy or download each file without leaving the page.
Cursor, Claude Code, Codex CLI, Gemini CLI, VS Code Copilot — one bundle, any harness.
Optional BYOK for local-only synthesis. Cloud path uses Gemini on GCP — keys never touch our servers.
Captures sync to the community cache so you can browse and reuse design bundles.
Gemini on GCP synthesizes new captures — no API key required in the extension.
Works with
Add Design Catcher to Chrome and capture your first design system in minutes. Chrome Web Store listing coming soon.