UUID v3 Generator
UUID v3
Computed locally in your browser. The same namespace and name always produce the same UUID — nothing is sent anywhere.
Deterministic, name-based UUIDs
UUID v3 derives a stable identifier from a namespace UUID plus a name string by hashing them with MD5 (RFC 9562 §5.4). Identical inputs always yield the same UUID, so v3 is ideal for idempotent keys, deduplication, and deterministic test fixtures — no database round-trip or randomness required. Prefer v5 (SHA-1) for new systems; reach for v3 when you need to match output from tools that emit v3 specifically.