StackRadar is a Chrome extension designed to unveil the technology stack behind any website, detecting over 300 technologies across 30 categories including frameworks, analytics, and payment systems. It operates entirely within the browser, ensuring user privacy by keeping all data local, with no external requests or user tracking. Key features include confidence scoring for tech detection, version identification, and privacy grading of websites. Additionally, the tool offers change detection alerts, one-click PDF reports, and the ability to export data in CSV and JSON formats for seamless integration into workflows.

The extension supports both casual and professional users with flexible plans. The free tier allows for 10 scans and 5 exports daily, while the Pro and Business tiers offer unlimited features, including bulk scanning and priority support. Users can easily switch between dark and light modes, and a 14-day trial of the Pro plan is available without requiring credit card information. StackRadar is a powerful tool for anyone interested in understanding website technologies.