UUID Generator

Generate universally unique identifiers (UUID) version 4 with customizable formatting options. Perfect for database keys, session IDs, and unique identifiers.

Generation Options

Format Examples

Standard (with hyphens):
550e8400-e29b-41d4-a716-446655440000
Compact (no hyphens):
550e8400e29b41d4a716446655440000
Uppercase with hyphens:
550E8400-E29B-41D4-A716-446655440000
Uppercase compact:
550E8400E29B41D4A716446655440000

Generated UUIDs

Generated: 0 UUIDs
Format: UUID v4 (Lowercase) with hyphens
Click "Generate UUIDs" to create universally unique identifiers.

📘 About UUIDs

UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across both space and time.

  • Version 4: Generated using random or pseudo-random numbers
  • Format: 8-4-4-4-12 hexadecimal digits
  • Probability of collision: Effectively zero for practical purposes
  • Use cases: Database primary keys, session IDs, file names, API keys