Full product DNA. One file. Voice, UX, content, architecture, behavior, performance, tech stack. 36 extraction passes. 200+ data points.

stackmd crawls any URL and extracts the full product DNA: brand voice, UX patterns, content strategy, visual design, information architecture, component behavior, SEO structure, and technology stack. 36 extraction passes. 200+ data points. 20 structured sections. Everything an AI agent needs to rebuild a product that works, feels, and thinks like the original.

$ npx stackmd https://example.com click to copy

What it looks like

terminal

$ stackmd https://linear.app

stackmd · full product DNA extraction

https://linear.app

✓ Extraction complete

✓ STACK.md → ./STACK.md

Summary

18 colors · 3 fonts · 5 components · 8 UX patterns

Voice: technical, warm, accessible · Page: landing · Score: 78/100

Stack: React, Next.js + Tailwind CSS

20 sections of product DNA · 36 extraction passes

Every STACK.md captures the complete picture. Here's what each section gives an AI agent.

Product Identity

Name, tagline, page type, frameworks, personality

DNA Score

0-100 across visual, voice, UX, a11y, SEO, perf

Brand Voice

Personality, reading level, pronouns, CTA style

Content Strategy

Headings, labels, placeholders, microcopy

Visual Design

Colors, type, spacing, depth, gradients, font loading

Components

Buttons, inputs, cards, nav with full CSS

UX Patterns

Hero, CTAs, forms, social proof, pricing

Architecture

Navigation, sections, footer, structure stats

Behavior

Modals, tooltips, validation, hover states

Motion

Durations, easings, keyframes, scroll behavior

Responsive

Breakpoints from @media rules

Accessibility

WCAG contrast, landmarks, ARIA, color matrix

SEO & Perf

Meta, structured data, DOM nodes, lazy loading

Tech Stack

Frameworks, analytics, hosting, third-party

Icons & Media

SVG system, image formats, video, figures

Layout System

Flex/grid patterns, container widths, gaps

Social Presence

Twitter, GitHub, Discord, LinkedIn links

Structured Data

JSON-LD, microdata, OpenGraph, Twitter Cards

Deep Report

Typography, color, layout, forms, media, nav, a11y, perf, content metrics

Agent Guide

Full prompt: identity + visual + voice + UX

Brand Voice Analysis

stackmd doesn't just read CSS. It reads the words. Every heading, paragraph, CTA, label, and piece of microcopy is analyzed for personality traits, reading level, pronoun strategy, punctuation style, and vocabulary patterns.

brand voice profile

tone profile

formality

warmth

technical

urgency

playful

signals

personality: warm, technical, accessible

reading level: standard (12 words/sentence)

pronouns: balanced (we + you)

CTA pattern: low-commitment (try/free)

punctuation: standard

density: concise

Install

terminal

npm install -g stackmd

Flag	Description	Default
`-o, --output`	Output file path	`./STACK.md`
`--json`	Output raw data as JSON	`false`
`--dark`	Extract dark mode tokens	`false`
`--wait <ms>`	Wait time for dynamic content	`3000`

Programmatic API

app.js

import { stack } from "stackmd"

const result = await stack("https://example.com")

result.data.brandVoice             // personality, reading level, CTA patterns
result.data.uxAnalysis             // page type, conversion, navigation
result.data.designSystem           // colors, fonts, spacing, components
result.data.techStack              // React, Next.js, Tailwind, analytics
result.data.architecture           // navLinks, sections, footerLinks
result.data.behavior               // modals, tooltips, validation
result.data.dnaScore               // 0-100 across 10 dimensions

Disclaimer

Educational & Experimental Use Only

This tool is provided strictly for educational and experimental purposes. It reads publicly visible content and computed CSS from rendered web pages, equivalent to what any browser's developer tools expose.

No proprietary code, assets, or non-public information is accessed
Extracted data represents publicly visible content and styling
No ownership of any product identity or brand is claimed
Users are responsible for compliance with applicable terms of service
Does not bypass any access controls, authentication, or rate limiting
Output should not be used to create confusingly similar products

The author provides this tool as-is with no warranty. Use responsibly.