UUID Generator

Generate universally unique identifiers (UUIDs) in various versions and formats

UUID Configuration

Common UUID Namespaces

DNS Namespace:

6ba7b810-9dad-11d1-80b4-00c04fd430c8

Use for domain names

URL Namespace:

6ba7b811-9dad-11d1-80b4-00c04fd430c8

Use for URLs

OID Namespace:

6ba7b812-9dad-11d1-80b4-00c04fd430c8

Use for ISO OIDs

X.500 Namespace:

6ba7b814-9dad-11d1-80b4-00c04fd430c8

Use for X.500 DNs

💡 Tips

  • • UUID v4 (random) is the most commonly used and doesn't require additional parameters
  • • UUID v1 includes timestamp and MAC address information
  • • UUID v3 and v5 are deterministic - same input always produces the same UUID
  • • UUID v3 uses MD5 hashing, v5 uses SHA-1 (v5 is recommended over v3)
  • • Use standard namespaces like DNS (6ba7b810-9dad-11d1-80b4-00c04fd430c8) for consistent results
  • • Generated UUIDs are cryptographically secure and globally unique
Privacy Notice:

Processing is ephemeral. Your files are handled in-memory and never stored or retained on the server. They are discarded immediately after the operation finishes.