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Design Systems

UI Style Extractor

Extract design systems from websites into reusable Markdown guides and validation demos for maintaining UI consistency.

What it does

UI Style Extractor automatically analyzes web pages and converts their design patterns into structured Markdown style guides. The tool captures colors, typography, spacing, components, and layout rules, then generates validation demos you can use to keep new designs consistent with source styles.

How it works

Simply point the tool at a website or HTML file, select an output folder, and let it extract design elements. The app reads the page structure, identifies design patterns, and compiles everything into easy-to-share Markdown documentation. It also creates validation demos you can open in a browser to compare new pages against the original design.

Use cases

  • Design system documentation: Quickly capture an existing site’s visual language without manual auditing
  • AI page validation: Verify that AI-generated content follows your brand’s design rules
  • Design handoff: Give developers or team members a clear, documented style reference
  • Multi-page consistency: Ensure new pages maintain the same visual patterns as source designs
  • Design audit: Study and document competitor or inspiration site design systems

Who benefits

Product designers, design systems practitioners, and UX leads who need to document or validate UI consistency across multiple pages or versions without manual style extraction.

Frequently asked questions

What design elements does UI Style Extractor capture?
The tool extracts colors, fonts, spacing, border and radius styles, button and form patterns, layout structure, and section order from web pages. It focuses on common design parts that help you reuse and document a page's visual system.
How do I install UI Style Extractor on Windows?
Download the zip file from the GitHub release page, extract it to a folder like Downloads or Desktop, then double-click the .exe file to run the app. If Windows SmartScreen appears, choose 'Run anyway' to proceed.
What output files does the tool create?
UI Style Extractor generates Markdown style guides, validation demo HTML files, component notes, style data in JSON format, and captured UI references. These files help you document and validate design consistency across pages.
Can I use this to validate AI-generated pages?
Yes. The tool creates validation demos you can open in a browser to compare new pages with the source design. Use it to check if buttons, text, spacing, and layout match the original style before deployment.
What types of pages work best with this tool?
Pages with stable layouts, visible text, clear button styles, consistent spacing, and defined colors and fonts produce the clearest output. Complex pages with many moving parts or overlays may need simplification first.
How do I use the generated Markdown guides?
Open the Markdown files in any text editor like Notepad or VS Code. Use them as reference documentation when building new pages, creating design specs, or handing off work to developers.
Can I extract styles from multiple pages?
Yes, but start with one page or section first to verify the output quality. This helps you check the results before running extraction on larger sets of pages.
What should I do if the app won't open on Windows?
Ensure the file finished downloading, extract the zip first (do not run from inside it), move the folder to a simple path like your Downloads folder, and close other apps if memory is low. Restart Windows if issues persist.

Glossary

Design system
A collection of reusable components, design patterns, and style rules that ensure visual consistency across multiple pages and products.
Style guide
Documentation that captures and explains design rules like colors, fonts, spacing, and component patterns, serving as a reference for maintaining consistency.
Validation demo
An interactive HTML file that displays extracted design rules and allows comparison between a source design and new pages to verify consistency.
UI extraction
The automated process of analyzing a web page and identifying visual elements, patterns, and design properties to create reusable documentation.

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