Developer License Detector

About

🔍 AUTOMATICALLY DETECT LICENSES & PREVENT LEGAL ISSUES

Developer License Detector is a powerful Chrome extension that scans web pages to identify JavaScript libraries, CSS frameworks, and other open-source components. It analyzes their licenses for compatibility with your project, helping you avoid costly license violations before they become legal problems.

Perfect for developers, tech leads, and legal teams who need to ensure open-source license compliance in their projects.

✨ KEY FEATURES

🎯 Multi-Method Library Detection
• Script Tag Analysis - Detects libraries from CDN URLs and source paths
• Global Object Detection - Identifies libraries through JavaScript globals
• Link Tag Analysis - Finds CSS frameworks and stylesheets
• Font Library Detection - Recognizes Google Fonts, Adobe Fonts, and more
• 100+ Popular Libraries Supported - React, Vue, Angular, jQuery, Bootstrap, Tailwind, and many more

📊 Intelligent License Analysis
• SPDX Compliance - Uses official SPDX license identifiers
• Compatibility Checking - Analyzes compatibility with your project's license
• Risk Assessment - Clear indicators: Compatible, Incompatible, or Unknown
• Detailed Explanations - Understand why licenses are or aren't compatible
• Comprehensive Coverage - Supports MIT, Apache, GPL, BSD, MPL, and more

🎨 Clean & Intuitive Interface
• Real-time Results - Instant analysis when you click the extension icon
• Modern Design - Clean, professional interface that's easy to navigate
• Smart Filtering - View all libraries or filter by compatibility status
• Detailed Information - See versions, licenses, detection methods, and more
• Statistics Dashboard - Quick overview of libraries and compatibility status

⚙️ Fully Customizable
• Project License Selection - Set your project's license for accurate analysis
• Persistent Settings - Your preferences are saved across sessions
• Works Everywhere - Analyze any web page, including local development sites

🔒 PRIVACY & SECURITY

Your privacy is our top priority:
• 100% Local Processing - All analysis happens on your device
• Zero Data Collection - We don't collect, track, or store any user data
• No External Requests - Doesn't communicate with external servers
• No Analytics - We don't track your usage or browsing
• Open Source - GPL-3.0 licensed, code is publicly auditable

🎯 WHO IS THIS FOR?

• Frontend Developers - Check dependencies on websites you're learning from
• Tech Leads - Ensure team compliance with license requirements
• Legal Teams - Audit open-source license usage in web applications
• Students - Learn about licensing in real-world projects
• Open Source Contributors - Understand license implications before contributing

🚀 HOW IT WORKS

1. Navigate to any web page
2. Click the extension icon in your toolbar
3. View instantly detected libraries and their licenses
4. Select your project's license from the dropdown
5. See compatibility analysis with clear risk indicators
6. Make informed decisions about using detected libraries

📖 SUPPORTED LICENSES

Permissive Licenses:
• MIT, Apache-2.0, BSD-2-Clause, BSD-3-Clause, ISC, Unlicense

Copyleft Licenses:
• GPL-2.0, GPL-3.0, LGPL-2.1, LGPL-3.0, AGPL-3.0

Weak Copyleft:
• MPL-2.0, EPL-2.0, CDDL-1.0

Creative Commons:
• CC0-1.0, CC-BY-4.0, CC-BY-SA-4.0

And many more SPDX-compliant licenses!

🎓 DETECTED LIBRARIES

JavaScript Frameworks & Libraries:
React, Vue.js, Angular, Svelte, jQuery, Lodash, Underscore, Moment.js, Date-fns, Axios, D3.js, Chart.js, Three.js, and more

CSS Frameworks:
Bootstrap, Tailwind CSS, Material Design, Bulma, Foundation, Semantic UI, and more

Web Fonts:
Google Fonts, Adobe Fonts, Font Awesome

💡 USE CASES

Development:
• Verify licenses before copying code from examples
• Audit third-party dependencies on competitor sites
• Learn from real-world license implementations

Due Diligence:
• Pre-acquisition license audits
• Compliance verification for existing projects
• Risk assessment for new dependencies

Education:
• Teaching open-source licensing concepts
• Understanding license compatibility
• Real-world license examples

🛠️ TECHNICAL DETAILS

• Manifest V3 - Built with the latest Chrome extension standards
• Offline Capable - Works without internet connection
• Fast & Lightweight - Minimal performance impact
• No Dependencies - Self-contained with no external dependencies
• Regular Updates - Continuously updated with new libraries and licenses

📊 COMPATIBILITY MATRIX

Based on:
• SPDX License List (official standardized identifiers)
• FSF Compatibility Guidelines (Free Software Foundation)
• OSI Recommendations (Open Source Initiative)
• Established legal precedents and interpretations

🤝 OPEN SOURCE PROJECT

Developer License Detector is open source and licensed under GPL-3.0. We welcome contributions!

• GitHub: https://github.com/mustafaer/developer-license-detector
• Report Issues: https://github.com/mustafaer/developer-license-detector/issues
• Contribute: See CONTRIBUTING.md in our repository

⭐ SUPPORT THE PROJECT

If you find this extension useful:
• Leave a review on the Chrome Web Store
• Star the project on GitHub
• Report bugs and suggest features
• Share with fellow developers

📧 CONTACT & SUPPORT

• GitHub Issues: https://github.com/mustafaer/developer-license-detector/issues
• Email: [email protected]

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Made with ❤️ for the developer community by Mustafa ER

Helping developers navigate the complex world of open-source licensing, one web page at a time.

DISCLAIMER: This tool provides guidance based on established compatibility interpretations, but should not be considered legal advice. Consult with a qualified attorney for legal decisions regarding licensing.