UUID v5 Generator
UUID v5
Computed locally in your browser with the Web Crypto API. The same namespace and name always produce the same UUID — nothing is sent anywhere.
Deterministic, name-based UUIDs
UUID v5 derives a stable identifier from a namespace UUID plus a name string by hashing them with SHA-1 (RFC 9562 §5.5). Identical inputs always yield the same UUID, so v5 is ideal for idempotent keys, deduplication, and deterministic test fixtures — no database round-trip or randomness required.