Free utilities
Tools
Network and security utilities for engineers who work with infrastructure daily.
CIDR Calculator
Calculate network address, broadcast, subnet mask, host range, and binary breakdown from any IPv4 CIDR block.
IPv4NetworkingSubnetting
IPv6 Calculator
Expand, compress, and analyze IPv6 addresses. Identify address type, network prefix, and hextet breakdown.
IPv6Networking
JSON / JWT Debugger
Pretty-print and validate JSON with syntax highlighting. Decode JWT tokens, inspect all claims, and see at a glance whether a token is expired.
JSONJWTAuthSecurity
Hash Generator
Generate and verify SHA-256, MD5, and bcrypt hashes. Drag a file to compute its checksum. Runs entirely in your browser.
SHA-256MD5bcryptSecurity
PGP File Encryption
Encrypt files with our PGP public key before sending them securely. Everything runs locally in your browser — files never leave your device.
PGPSecurityEncryption