UUID Generator
Generate UUIDs (Universally Unique Identifiers) in versions 1, 2, 3, 4, and 5. All processing happens locally.
FAQ
What UUID versions are supported?
All UUID versions are supported: v1 (time-based), v2 (DCE Security), v3 (name-based MD5), v4 (random), and v5 (name-based SHA-1).
What is the difference between UUID versions?
v1: Time-based UUID using timestamp and random node identifier.
v2: DCE Security variant (rarely used).
v3: Name-based UUID using MD5 hashing with namespace and name.
v4: Random UUID (most common, default).
v5: Name-based UUID using SHA-1 hashing with namespace and name.
When should I use which version?
v4: Use for most cases when you need a random unique identifier.
v3/v5: Use when you need deterministic UUIDs from the same input (e.g., generating UUIDs for URLs or domain names).
v1: Use when you need time-ordered UUIDs.
What namespaces are available for v3 and v5?
Standard namespaces: DNS, URL, OID, and X500. You can also provide a custom namespace UUID.