StackRadar - Website Technology Detector

See every technology behind any website. 300+ techs, 30 categories. 100% local — your data never leaves your browser.

Instantly see the complete tech stack behind any website — frameworks, analytics, CDNs, payment systems, and 26 more categories. StackRadar detects 300+ technologies with confidence scoring and version detection, all running 100% locally in your browser. No data ever leaves Chrome. WHAT YOU GET - Detect 300+ technologies across 30 categories (frameworks, CMS, analytics, CDN, payments, AI/ML, and more) - Confidence scoring shows how certain each detection is - Version detection identifies exact framework versions - Privacy grading rates each site's tracking footprint (A through F) - Change detection alerts you when a site's tech stack changes - One-click PDF reports for stakeholders and clients - CSV and JSON export for your workflows - Scan history with timeline tracking - Side-by-side site comparison (shared vs unique technologies) - Bulk scan up to 25 sites at once (Business tier) - Dark mode and light mode with system auto-detection PRIVACY YOU CAN VERIFY - All analysis runs locally inside your browser using fingerprint pattern matching - Zero network requests to external servers for analysis - No user tracking, no analytics collection, no browsing history sent anywhere - No account required to use the free tier - URLs and scan history encrypted at rest with AES-256-GCM FLEXIBLE PLANS - Free: 10 scans per day, 5 exports per day — everything you need for casual use - Pro ($9.99/mo): Unlimited scans and exports, PDF reports, change detection, priority support - Business ($19.99/mo): Bulk scanning, webhooks for Zapier/Make integrations, everything in Pro - Every install includes a 14-day Pro trial, no credit card required Install StackRadar and scan your first site in under 3 seconds. Your data stays yours.