DesignSnap

Capture design tokens from any website, preview components, and export AI-ready DESIGN.md for frontend development.

# DesignSnap DesignSnap is a Chrome Side Panel extension that captures the design language of the page you are viewing and turns it into AI-ready design documentation. It is built for people who use AI coding tools to create or rebuild frontend interfaces. Instead of describing a website's style by hand, DesignSnap scans the current page, extracts visual rules, and exports a structured `DESIGN.md` file that helps AI coding assistants reproduce the design more accurately. ## Why You Should Install It AI coding tools are powerful, but they often struggle with visual consistency. A prompt such as "make it look like this website" is usually too vague. Screenshots can show the final result, but they do not provide the exact colors, typography, spacing, radius, shadows, and component patterns needed to implement the interface well. DesignSnap fills that gap. It turns a real website into practical design context that can be reviewed, edited, and reused. Install DesignSnap if you want to: - Give AI coding tools clearer design instructions. - Rebuild an existing interface while keeping its visual style. - Capture colors, fonts, spacing, radius, shadows, and component patterns from a live page. - Create a useful design reference without manually inspecting every CSS rule. - Generate a `DESIGN.md` file that can be used with Cursor, Copilot, Codex, or other AI-assisted development tools. - Export design tokens for implementation, documentation, or team handoff. ## What DesignSnap Does DesignSnap scans the current website only when you open the side panel and start a scan. It then analyzes the visible page and extracts the design information that matters for frontend implementation. It can identify: - Color palettes and semantic color usage. - Typography, including font families, font sizes, line heights, and text roles. - Spacing rhythm and layout patterns. - Border radius values. - Shadow styles. - Common UI components such as buttons, inputs, cards, badges, navigation items, and tables. - Component evidence that helps explain where the design rules came from. The result is shown in a side panel where you can review the extracted design system, adjust values, inspect component samples, and export files. ## Main Output DesignSnap exports files that are useful for AI-assisted frontend development: - `DESIGN.md`: a structured design guide for AI coding assistants. - `tokens.css`: CSS custom properties based on the extracted design tokens. - `design-tokens.json`: design token data in a DTCG-compatible format. The most important output is `DESIGN.md`. It gives AI tools a concrete description of the page's visual language, including tokens, component rules, and implementation guidance. ## How It Helps AI Coding Workflows DesignSnap is useful when you want an AI tool to build a new screen that matches an existing product, marketing page, dashboard, or design system. Without structured design context, AI output can look close in layout but wrong in details. Colors may be slightly off, type scale may not match, spacing may feel inconsistent, and components may miss the style rules that make the original interface recognizable. DesignSnap gives the AI tool better source material. It captures the design evidence from the page and turns it into a readable document that can be included in an implementation task. ## Manual Review And Calibration DesignSnap does not force you to accept every automatic result. After scanning, you can review extracted tokens and component examples in the side panel. You can also select important page elements as golden samples. This helps DesignSnap refine the exported design information when the page contains complex styling, special components, or visual exceptions. ## Optional AI Enhancement DesignSnap can optionally use an AI provider configured by the user to improve the generated `DESIGN.md` or assist with page role recognition. AI features are optional. DesignSnap sends data to an AI provider only when you enable an AI scan or AI enhancement. The extension does not send full HTML. It uses cleaned design evidence, structured tokens, component rules, or the generated design document. ## Privacy And Control DesignSnap is user-driven. It does not automatically scan every website you visit. A scan starts only when you open the side panel and choose to scan the current page. Design information is processed locally in the browser unless you enable an AI feature. Local data can include page URL, text snippets, selectors, computed styles, colors, typography, spacing, radius, shadows, and inferred component roles. API keys, AI provider settings, and recent scan project data are stored in your browser's local extension storage. DesignSnap does not load remote code and does not continuously collect browsing history in the background. ## Permissions Explained DesignSnap requests permissions that support its scanning, side panel, export, and optional AI workflows: - `activeTab`: access the current tab after you start a scan. - `tabs`: show and restore the current scan target in the side panel. - `scripting`: run the scanner, element picker, and highlighter on pages you authorize. - `storage`: save settings, AI provider configuration, and recent scan state. - `downloads`: save exported design files to your device. - `sidePanel`: provide the main DesignSnap workspace. - `contextMenus`: provide extension menu actions. - `declarativeNetRequestWithHostAccess`: support local AI service compatibility for `localhost` and `127.0.0.1`. - Optional site permissions: requested only when needed for scanning a site, adding same-site pages, or accessing a user-configured AI endpoint. ## Best For DesignSnap is especially useful for: - Frontend developers using AI coding assistants. - Product engineers rebuilding or extending existing interfaces. - Design engineers documenting design systems that already exist in code. - Teams that need a lightweight design handoff from a real website. - Builders who want AI-generated UI to match a specific visual style more reliably. ## Important Limitations - Cross-origin iframes cannot be scanned. - Closed Shadow DOM cannot be inspected. - AI enhancement sends structured design data and generated `DESIGN.md`, not full HTML. - Some design systems may still require manual review and correction after scanning.