Loading...
Generate cryptographically unique identifiers — UUID v4 (random) or v7 (time-ordered)
5698e5fc-7b6b-4bed-a1b3-bf60c5315f60122 bits of pure randomness. The most widely used version. Probability of collision is astronomically low — you'd need to generate 2.71 × 10¹⁸ UUIDs for a 50% chance of one duplicate.
Embeds a Unix timestamp in milliseconds for natural chronological sorting. Ideal for database primary keys — better index performance than v4 because new records append to the B-tree instead of scattering randomly.