GUID Generator

Generate Globally Unique Identifiers (GUIDs) and UUIDs instantly. Choose from different versions, customize formats, and generate multiple IDs at once. Perfect for developers who need unique identifiers for their applications.

GUID Generator

Generate Globally Unique Identifiers (GUIDs) and UUIDs with our free online generator. Perfect for developers who need unique identifiers for databases, applications, or any system requiring unique IDs.

Features

  • Generate RFC 4122 compliant UUIDs
  • Multiple UUID versions:
    • Version 4 (random)
    • Version 1 (timestamp-based)
    • Nil UUID
  • Bulk generation
  • Copy to clipboard
  • Format options:
    • Uppercase/lowercase
    • With/without braces
    • With/without hyphens
  • Mobile-friendly interface
  • No registration required

How to Use

  1. Choose UUID version
  2. Select format options
  3. Generate one or multiple UUIDs
  4. Copy results to clipboard
  5. Generate more as needed

Understanding UUIDs

UUID Format

  • 32 hexadecimal digits
  • Displayed in 5 groups
  • Separated by hyphens
  • 8-4-4-4-12 pattern
  • Example: 550e8400-e29b-41d4-a716-446655440000

UUID Versions

Version 4 (Random)

  • Most commonly used
  • Cryptographically random
  • Highest collision resistance
  • Best for most applications

Version 1 (Timestamp)

  • Based on timestamp
  • Includes MAC address
  • Sequential for sorting
  • Good for logging

Nil UUID

  • All zeros
  • Special purpose
  • Used as default value
  • System placeholder

Common Applications

Development

  • Database primary keys
  • Distributed systems
  • Session identifiers
  • Cache keys

System Design

  • Message IDs
  • Transaction IDs
  • Document references
  • Entity tracking

Testing

  • Test data generation
  • Mock identifiers
  • Scenario creation
  • System validation

Why Use Our Generator

  • Instant generation
  • Multiple formats
  • Bulk creation
  • Clear interface
  • Works offline
  • Free to use
  • No ads or popups