Security & Encoding
Cryptographic hash generators, encoders, and security utilities.
Online Hash Generator (SHA-256, SHA-512)
Generate cryptographic hashes (SHA-256, SHA-512) instantly in your browser.
Passphrase Generator
Generate memorable passphrases from a local word list using your browser’s secure random source, with the exact entropy shown.
Random String Generator
Generate cryptographically secure random strings with your choice of length and character sets, optionally excluding look-alike characters.
HMAC Generator
Compute an HMAC signature from a secret key and message using the Web Crypto API. Hex and Base64 output, entirely in your browser.
File Hash Calculator
Calculate the SHA-256, SHA-384 or SHA-512 checksum of a file locally, with real progress on large files and a compare box for verification.
Password Strength Checker
Estimate how resistant a password is to guessing, with specific findings on dictionary words, patterns, sequences and repeats. Nothing is stored or sent.