UUID v4 Generator

What are UUID v4 & v7 (RFC 9562)?

UUID (Universally Unique Identifier) is a 128-bit identifier represented by 32 hexadecimal characters across 5 hyphenated groups (8-4-4-4-12). AurumTools follows RFC 9562, published by the IETF in May 2024 (which officially obsoletes RFC 4122).

• UUID v4 (Random): Uses 122 cryptographically strong pseudo-random bits for pure randomness.
• UUID v7 (Time-ordered): Embeds a 48-bit millisecond Unix timestamp, delivering optimal database B-Tree index locality and sequential sorting.

UUID v4 Collision Probability (Birthday Paradox)

UUID v4 has 2^122 (approx. 5.3 × 10^36) possible values. Generating 1 billion UUIDs per second would take approximately 86 years to reach a 50% collision probability, and generating continuously for 100 years yields only about a 61% probability.