Generate UUIDs, hashes and passwords locally

Three generators for values you need constantly: universally unique identifiers, cryptographic digests and random passwords. The UUID generator produces version 4 IDs from the browser's secure random source (RFC 4122/9562); the hash generator computes SHA-256 and SHA-1 with the native Web Crypto API, plus MD5 for legacy checksums; the password generator draws every character with crypto.getRandomValues.

Generation happens on your device, which matters more than it sounds: an ID or a hash of your data generated on someone's server tells that server something about your data. Here, nothing is sent — the value appears in the page and goes no further.