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