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UUID Generator

Generate UUIDs (Universally Unique Identifiers) in v1 or v4 format for your applications

What is a UUID Generator?

A UUID (Universally Unique Identifier) generator creates unique identifiers that are virtually guaranteed to be unique across time and space. UUIDs are 128-bit identifiers typically represented as 32 hexadecimal digits displayed in five groups separated by hyphens (e.g., 550e8400-e29b-41d4-a716-446655440000).

Our free UUID generator allows you to generate UUIDs in v1 (time-based) or v4 (random) formats. UUIDs are commonly used in databases, APIs, distributed systems, and anywhere you need unique identifiers without a central authority.

Why Use UUIDs?

  • Uniqueness: Virtually guaranteed to be unique globally
  • No Central Authority: Generate without coordination
  • Database Keys: Use as primary keys in distributed databases
  • API Development: Generate unique IDs for resources
  • Security: Harder to guess than sequential IDs

Generator Settings

About UUIDs

UUID (Universally Unique Identifier) is a 128-bit identifier used to uniquely identify information in computer systems. UUIDs are commonly used in databases, APIs, and distributed systems.

UUID Versions:

  • Version 4 (Random) - Generated using random numbers. Most commonly used for unique IDs.
  • Version 1 (Time-based) - Generated based on timestamp and MAC address. Useful for sorting by creation time.

Common Use Cases:

  • Database primary keys
  • API request/response IDs
  • Session identifiers
  • File naming
  • Distributed system identifiers