Calculate CVSS scores, inspect JWT tokens, design CIDR subnets, and generate crypto hashes instantly. Free, lightweight browser-based security utilities. Key features: • CVSS v4.0 / v3.1 calculators & Risk Matrix • Client-side JWT Inspector & signature debugging • Interactive CIDR & Subnet planners • Cryptographic hash generators & multi-decoders • 100% free, fast, zero auth, and ad-free.