Unlock the secrets of any browser extension. View source code for Chrome, Firefox, and Opera extensions with a single click.
Users
26
+4 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
2
0 in 30 days
Store rank
#137K
#114K among extensions
Version
2.1.1
updated 19 Feb 2026
Users
monthly, 9 months
Latest, 16 Oct 2026:26 usersMove the mouse over the chart for any month
Ratings count
monthly, 9 months
Latest, 16 Oct 2026:2 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About CodeLens: Extension Source Explorer
CodeLens: Extension Source Explorer
Unlock the secrets of any browser extension. View source code with a single click.
CodeLens is the ultimate professional toolkit for developers, security researchers, and privacy advocates. It provides a high-performance, premium environment to inspect the source code of any extension from the Chrome Web Store, Firefox Add-ons (AMO), Microsoft Edge Addons, and Opera—no manual downloads or local extraction required.
� INSTANT ANALYSIS
• One-Click Inspection: Open the source code of any extension directly from its store listing.
• Multi-Store Support: Seamlessly switch between Chrome, Firefox, Edge, and Opera extension analysis.
• Context Menu Integration: Right-click any link to a web store page to jump straight into the source.
🎨 PREMIUM DEVELOPER EXPERIENCE
• Modern Aesthetic: A stunning, high-contrast interface featuring glassmorphism, smooth animations, and a focus on visual excellence.
• Intelligent UI: Choose between a sleek, deep Dark Mode or a refined, high-contrast Light Mode.
• Command Palette (Ctrl+P): Find and open files instantly with a powerful, developer-first command interface.
• Professional Highlighting: Native syntax highlighting for JavaScript, HTML, CSS, JSON, and more using an optimized JetBrains Mono typeface.
🔍 DEEP SEARCH & FILTERING
• Smart Filtering: Instantly filter the file tree by category—Code, Markup, Images, Locales, or Miscellaneous.
• Global Regex Search: Powerful text search engine that scans across thousands of files instantly.
• Image Previewer: Built-in support for inspecting icons, illustrations, and SVG assets.
• Manifest Intelligence: Dedicated views for analyzing manifest permissions, content scripts, and background logic.
🛠️ PRO WORKFLOWS
• GitHub Integration: Connect your account and upload any inspected extension source directly to your GitHub repositories for versioning or team collaboration.
• Quality Auditing: Detect risky patterns, permission overreach, and manifest vulnerabilities with a few clicks.
• Local Exports: Download the original CRX/XPI package or export the entire extracted source as a clean .ZIP file.
�️ PRIVACY & SECURITY FIRST
CodeLens is built with a strictly "Client-Side First" architecture. All processing, zip extraction, and code rendering occur locally on your machine.
• No Remote Code: We do not use eval() or external script loading.
• Zero Data Collection: Your analysis history and code remain private on your device.
• Open Transparency: Built by developers for developers, with a focus on trust and auditability.
PERFECT FOR:
• Security Researchers: Vetting extensions for malware or data leaks.
• Web Developers: Learning modern architecture and best practices from top extensions.
• Privacy Advocates: Verifying precisely what an extension does with your browser permissions.
• Students: Exploring the internals of real-world browser applications.
Empower your workflow with CodeLens—the fastest and most beautiful way to explore the extension ecosystem.
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V2.1.0 - Source by Subhan Haider
CodeLens: Extension Source Explorer
All rights reserved.