UUID Generator

Generate UUIDs (Universally Unique Identifiers) version 1 or 4

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Free UUID Generator - Generate Unique Identifiers Online

Why Use Our UUID Generator?

Our free UUID generator creates universally unique identifiers (UUIDs) instantly. Also known as GUIDs (Globally Unique Identifiers), these 128-bit values are guaranteed to be unique across all systems. Perfect for database primary keys, session IDs, distributed systems, and API tokens.

Generate UUID v4 (random-based) for maximum uniqueness or UUID v1 (timestamp-based) when you need time-ordered identifiers. Bulk generation supported with options for formatting with or without dashes.

Key Features

  • UUID v1 & v4 - Timestamp-based or random generation
  • Bulk Generation - Generate up to 50 UUIDs at once
  • Format Options - With or without dashes
  • Individual Copy - Copy each UUID separately
  • Copy All - Copy multiple UUIDs at once
  • Free to use - No limits or registration

How to Generate UUIDs Online

  1. Select UUID Version - Choose v4 (Random) for general use or v1 (Timestamp) for time-ordered IDs.
  2. Set Count - Specify how many UUIDs to generate (1-50).
  3. Choose Format - Check "No dashes" if you need compact format without hyphens.
  4. Generate - Click "Generate UUID" to create your unique identifiers.
  5. Copy & Use - Copy individual UUIDs or all at once. Ready to paste into your code or database.

Common Use Cases

  • Database Primary Keys - Use as unique identifiers for database records across distributed systems
  • Session Tokens - Generate secure session IDs for web applications
  • API Keys - Create unique API tokens and request identifiers
  • File Names - Generate unique file names to prevent conflicts in storage systems
  • Transaction IDs - Track transactions across microservices and distributed architectures
  • Message Queue IDs - Uniquely identify messages in queuing systems

UUID Version Differences

UUID v4 (Random)

Generated from random or pseudo-random numbers. Most commonly used version.

Format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx

Best for: General unique identifiers, no time ordering needed

UUID v1 (Timestamp)

Generated from timestamp and node ID (MAC address or random). Time-ordered.

Format: xxxxxxxx-xxxx-1xxx-yxxx-xxxxxxxxxxxx

Best for: Time-ordered records, sorting by creation time

Pro Tip: Use UUID v4 for most applications as it provides better privacy (no timestamp or MAC address). Use UUID v1 when you need chronological sorting or want to extract creation time from the UUID. For database indexes, consider using compact format (no dashes) to save space. UUIDs are case-insensitive and typically stored in lowercase.
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