Network & Security Tools

Networking, certificates, hashing, and security utilities.

• Password Strength Checker

  Estimate password entropy and time-to-crack using the zxcvbn algorithm. Shows realistic crack time estimates under different attack scenarios — far more accurate than simple strength bars.

• Hash Generator

  Generate MD5, SHA-1, SHA-256, and SHA-512 hashes of any string. Useful for checksums, data integrity verification, and understanding hash output lengths for each algorithm.

• SSL Certificate Decoder

  Paste a PEM-encoded SSL/TLS certificate to inspect issuer, subject, SANs, validity period, public key, and signature algorithm. Everything runs in your browser — no certificate is uploaded.

• IP/CIDR Subnet Calculator

  Compute subnet range, network mask, broadcast address, and usable host count for any IPv4 CIDR block. Also shows all subnets when you split a block — useful for network planning.