UUID Generator

Generate UUID v1, v3, v4, v5 with bulk generation support

uuidguididentifierrandomuniquegenerator

UUID Generator

UUID Version

Quantity

Generate up to 1000 UUIDs at once

Format Options

Uppercase lettersInclude hyphens

About UUID Versions

Version 1 - Timestamp

Generated using timestamp and MAC address. Guarantees uniqueness across space and time, but may reveal information about when and where it was created.

Version 4 - Random

Uses random or pseudo-random numbers. Most commonly used version with 122 bits of randomness. Probability of collision is negligible.

Version 5 - Namespace

Generated using SHA-1 hash of namespace and name. Deterministic - same input always produces the same UUID. Useful for consistent identifiers.

Common Use Cases

• Database primary keys and unique identifiers

• Distributed systems without central ID authority

• Session tokens and temporary identifiers

• File and object naming in cloud storage

• Message and transaction identifiers

• API request tracking and correlation IDs