UUID Generator - Free Online UUID v4 & v1
Generate random UUIDs (Universally Unique Identifiers) in various formats. Supports UUID v4 (random) and UUID v1 (timestamp-based).
What is UUID Generator?
UUID Generator creates Universally Unique Identifiers (UUIDs) that are 128-bit numbers used to uniquely identify information in computer systems. UUIDs are essential for distributed systems, databases, and APIs where unique identifiers are needed without central coordination.
UUID Versions
- UUID v4: Randomly generated using random numbers. Most commonly used.
- UUID v1: Based on timestamp and MAC address. Contains time information.
Format Options
- Standard: 8-4-4-4-12 hexadecimal format (e.g., 550e8400-e29b-41d4-a716-446655440000)
- Uppercase: All characters in uppercase
- No Hyphens: Compact format without separators
- With Braces: Wrapped in curly braces for registry format