An open-source web tool that displays "unbuilt" websites to reveal their tech stack in real-time. Takes seconds to analyze bundled and minified code to detect modern and legacy technologies by URL.
🚀 Live at: https://unbuilt.app
⚠️ Beta Status: The application is currently in beta. We're actively improving detection patterns based on usage data, stability and any issues.
unbuilt.app is a reverse engineering tool for the modern web. While developers build applications with various frameworks and libraries, we help to see it unbuilt and reveal what's under the hood in real-time.
- Real-Time Code Analysis - Unlike alternative tools that use static signatures, we deconstruct websites in real-time. It allows to have analysis for any web application and latest available technologies.
- 100% Open Source - Every pattern is transparent and community-driven, unlike closed-source alternatives
- Completely Free - No premium plans, usage limits, or restricted features that plague other tools
- Lightning Fast - Analysis takes just seconds instead of minutes with competing solutions
- Modern Tech Focus - Specialized in detecting cutting-edge frameworks and tools that other analyzers miss
- Evidence-Based Results - We only report technologies with verifiable code evidence, not guesswork
- Queue-Based Architecture - Ensures stability even under heavy load
- Intelligent Caching - Immediate results for previously analyzed sites with ability to get fresh analysis any time
- Community-Driven - Patterns are continuously improved by developers like you
- Can Run Local Analysis - Run complete website analysis via CLI tool without sending data to external servers (and browser extension coming soon)
| Feature | Unbuilt | Other Alternatives |
|---|---|---|
| Detection Method | Real-time code execution with pattern-based detection | Primarily pattern-based detection |
| Data Relevance | Fresh analysis can be triggered any time | Often rely on pre-saved data or hardcoded values from user reports |
| Source Code | 100% open-source | Mix of open and closed source solutions |
| Price | Completely free, no usage limits | Often freemium with paid tiers for advanced features |
| Community Contribution | Direct pattern contributions encouraged | Typically limited to issue reporting |
| Modern Tech Focus | Specialized in detecting cutting-edge frameworks | Varies, often slower to detect newest technologies |
| Detection Transparency | Clear evidence for each detected technology | Often limited visibility into detection reasoning |
| Analysis Speed | Results typically in under 10 seconds | Varies by tool and website complexity |
| Local Analysis | Comprehensive CLI tool with full capabilities | Available in some tools with varying capabilities |
unbuilt.app deconstructs websites to reveal technologies across these categories:
- Bundlers - Webpack, Vite, Rollup, Parcel, etc.
- UI Libraries - React, Vue, Angular, Svelte, etc.
- Frameworks - Next.js, Vitepress, Nuxt.js, Storybook, Remix, etc.
- Minifiers - Terser, UglifyJS, etc.
- Styling Processors - Sass, Less, PostCSS, etc.
- Module Systems - CommonJS, ES Modules, AMD, etc.
- UI Libraries - Material UI, Chakra UI, Tailwind, etc.
- State Management - Redux, MobX, Zustand, etc.
- HTTP Clients - Axios, Fetch, SuperAgent, etc.
- Routers - React Router, Vue Router, Next.js internal router, etc.
- Translation Libraries - i18next, react-intl, etc.
- Date Libraries - Moment.js, date-fns, Luxon, etc.
- Analytics - Google Analytics, Mixpanel, Umami, Microsoft Clarity, etc.
- Styling Libraries - TailwindCSS, MUI, Lucide, shadcn/ui, etc.
- Transpilers - Babel, SWC, TypeScript, etc.
- Monitoring - Sentry, Datadog, Rollbar, Newrelic, Opentelemetry, Vercel Speed Insights, etc.
- Platforms - Wix, Weebly, Webflow, Squarespace, Shopify, etc.
- Unbuilt Resources - Js/CSS/HTML files, DOM elements, etc.
The list of supported technologies within each category is continuously expanding.
Analyze web technologies across multiple platforms:
- Web Application - Quick analysis via browser at unbuilt.app
- CLI Tool - Analyze sites directly from your terminal
- Coming Soon: Browser Extension - Analyze sites as you browse, even behind authentication
npm install -g @unbuilt/cliunbuilt <url>Check more details in the CLI documentation.
Why list everything here when you can check it on unbuilt unbuilt.app!
Yes, we've unbuilt ourselves too! We practice what we preach.
We welcome contributions from the community! Help us see the web unbuilt together by checking out our CONTRIBUTING.md guide for detailed information on:
- Creating Issues (RFCs)
- Pull Request process
- Feature Pattern API
- Testing your contributions
Your help makes unbuilt.app better for everyone!
- Browser Extension - Unbuild any site as you browse
- Additional Detection Categories - Expand our unbuilding capabilities
- Technology Versions - Detect major or even minor/patch versions of specific technologies
We'll add more contact information as the project evolves.
This project is licensed under the MIT License - see the LICENSE file for details.