Password strength analyzers, Subnet/CIDR calculators, and Content Security Policy generators.
Measure cryptographic randomness, Shannon entropy (0-8 bits/byte), Chi-square test, and byte distributions.
Brute-force all 256 single-byte XOR keys with automated English frequency & chi-squared scoring.
Audit CSP, HSTS, X-Frame-Options, and security headers with OWASP grading (A+ to F).
Compare memory hardness, GPU ASIC resistance, and security parameters across KDF standards.
Generate secure RFC 6238 Base32 TOTP secret keys and standard otpauth:// URIs for Google Authenticator.
Generate RFC 6844 CAA iodef DNS records to receive unauthorized TLS issuance alerts.
Compute 512-bit NIST FIPS 202 SHA-3 cryptographic hashes in-browser.
Verify HS256 signed JSON Web Tokens against secret keys with zero network egress.
Translate IPv4 addresses into DWORD integers, dotted hexadecimal (0x7F.0x0.0x0.0x1), and octal notation.
Parse Argon2 encoded strings into type, version, memory (m), iterations (t), and parallelism (p).
Calculate SHA256 and MD5 host key fingerprints from ssh-ed25519 public keys.
Inspect ASN.1 tag identifiers (0x30 SEQUENCE, 0x02 INTEGER, 0x06 OID) from raw hex bytes.
Validate `<script integrity='sha384-...'>` tags for CDN asset tampering protection.
Analyze TLS 1.3 / 1.2 cipher suites for Perfect Forward Secrecy (ECDHE) and AEAD encryption.
Calculate key stretching hash latency and brute-force cost across Bcrypt salt rounds (10 to 14).
Configure ALPN protocol lists (h2, http/1.1, h3) for Nginx and Caddy TLS handshakes.
Extract embedded 48-bit millisecond creation timestamps from time-ordered UUIDv7 strings.
Generate RFC 6844 CAA issuewild DNS records to restrict wildcard SSL issuance.
Convert IPv4 and IPv6 addresses into reverse DNS PTR lookups (e.g. 4.3.2.1.in-addr.arpa).
Generate high-entropy 512-bit HMAC signatures for financial and payment API webhooks.
Simulate PBKDF2 key derivation iterations (HMAC-SHA256) and key stretch latency.
Generate cryptographic HMAC-SHA384 signatures for API authentication headers.
Discover more utilities across different domains
