YANSII™ — Your Adaptive Next-Step Intelligent Inspector

AI-powered passive security scanner for bug bounty hunters. 63 scanners, AI copilot, request replay, and traffic analysis.

YANSII™ is a passive security scanner that helps authorized security researchers and bug bounty hunters find potential vulnerabilities on websites they have permission to test. RESPONSIBLE USE - Scanning only runs on domains you explicitly add to your target scope - A mandatory consent screen requires you to confirm authorized use before any scanning begins - Safe Mode is ON by default — new installs start in passive-only mode - The crawler respects robots.txt - No data is collected or sent externally — all findings stay in your browser HOW IT WORKS 1. Set your target scope to authorized domains 2. Browse any website in scope — scanners run automatically in the background 3. Check the Dashboard for findings grouped by domain, severity, and confidence SCANNER PIPELINE 68 scanners across 7 pipeline stages covering OWASP Top 10 categories including cross-site scripting, injection flaws, CSRF, CORS misconfigurations, insecure cookies and headers, open redirects, information disclosure, exposed APIs, content security policy issues, and JWT vulnerabilities. CONFIDENCE SCORING Every finding is classified into 4 tiers — Confirmed, Likely, Possible, or Noise — based on 10 scoring factors. Filter by confidence to focus on what matters. EXPORT FORMATS Export findings as JSON, CSV, SARIF, or Markdown with one click. Reports include severity breakdown, remediation guidance, and full evidence trails. PRO FEATURES Upgrade to Pro for advanced capabilities: - Intelligence Layer with 6 AI-powered analysis components that map application structure, predict likely vulnerabilities, link findings into multi-step attack chains, adapt scanner behavior based on security posture, learn patterns across sessions, and assess impact with CVSS 3.1 scoring and bounty estimates - AI Copilot with a 3-stage pipeline to classify, verify, and report findings (requires your own AI API key) - Deep analysis and verification tools for individual findings - Framework-aware deep scanning for popular web application frameworks - Deterministic validation to suppress false positives at the code level - Custom scanner rules you define in JSON - Out-of-Band detection for blind vulnerability classes - One-click report generation for major bug bounty platforms - Event-driven scanner chaining for advanced discovery workflows PRIVACY - All scanning and analysis happens locally in your browser - No data is sent to YANSII servers — there are no YANSII servers - AI features use your own API key — your data goes directly to your chosen AI provider - Session Memory stores only anonymized patterns — no URLs, no credentials, no PII - Full privacy policy: https://yansii.in/privacy DISCLAIMERS - CVSS scores are estimates — verify independently - Bounty estimates are rough guides — actual payouts may vary - Regulatory flags are informational — not legal or compliance advice - All findings should be verified manually before reporting This tool is intended for authorized security testing only. Unauthorized scanning of systems you do not own or have permission to test may violate applicable laws. See YANSII Pro in action: [https://youtu.be/Sc8v0WSD2Dk?si=VTporRtm_JBUxizM Website: https://yansii.in