Evaluate password strength using information entropy math and zxcvbn heuristic estimation with zero network transmission.
Configures password during client-side password entropy & strength auditor computation.
Configures generator mode during client-side password entropy & strength auditor computation.
Configures gen length during client-side password entropy & strength auditor computation.
Configures gen upper during client-side password entropy & strength auditor computation.
Type your password above or click one of the quick test presets to calculate Shannon information entropy, heuristic vulnerabilities, and Hashcat crack times.
Mathematical estimate to test 50% average keyspace combinations at varying hardware hash rates.
Humans picking complex symbols like "Tr0ub4dor&3" are hard for humans to remember yet easy for computers to crack via leetspeak rules. Long Diceware passphrases ("correct-horse-battery-staple") are memorable and mathematically resilient.
Verify that your password matches the expected string format. Load a built-in sample preset to compare structural formatting.
Check the generator mode setting in Password Entropy & Strength Auditor to ensure encoding, precision, or specification version matches your target runtime.
Encrypt and decrypt strings and files using modern AES-GCM 256-bit cryptography powered by the native browser Web Crypto API.
Decode and inspect TLS/SSL certificates, examining SANs, expiration dates, issuer hierarchies, and public key fingerprints.
Encode and decode raw byte strings to Base58 and Base58Check formats used in Bitcoin, IPFS, and Solana.
Generate bcrypt password hashes with custom salt rounds and verify candidate passwords against existing hashes locally.
RFC 2104 準拠の鍵付きハッシュ（HMAC-SHA256、HMAC-SHA512、HMAC-SHA1、HMAC-MD5）をブラウザ内で瞬時に算出・定数時間（Timing-Safe）検証。
Generate cryptographically secure 2048-bit and 4096-bit RSA public/private key pairs in PEM and PKCS#8 formats in your browser.