UUID Generator: Create Unique Identifiers Instantly

Generate cryptographically secure UUIDs (Universally Unique Identifiers) for your applications. Supports UUID v4 (random) and v1 (timestamp-based). All generation happens in your browser.

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. UUIDs are standardized by the Open Software Foundation (OSF) as part of the Distributed Computing Environment (DCE).

UUID Versions:

Version 4 (Random):

Generated from random or pseudo-random numbers. This is the most commonly used version. Example: 550e8400-e29b-41d4-a716-446655440000

Version 1 (Timestamp):

Generated using the current timestamp and the MAC address of the computer. Useful when you need to know when a UUID was created. Example: 6ba7b810-9dad-11d1-80b4-00c04fd430c8

Common Use Cases:

  • Database primary keys
  • Session identifiers
  • File and document identifiers
  • Transaction IDs
  • Distributed system identifiers
  • API request tracking

Features:

  • Cryptographically secure generation using Web Crypto API
  • Support for UUID v4 (random) and v1 (timestamp-based)
  • Multiple output formats (standard, uppercase, no-hyphens, braces)
  • Bulk generation (up to 100 UUIDs at once)
  • 100% client-side - no server communication
  • Your UUIDs never leave your browser

UUID Format:

A standard UUID consists of 32 hexadecimal digits displayed in 5 groups separated by hyphens:

xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx

Where:

  • M indicates the version (4 = random, 1 = timestamp)
  • N indicates the variant (always 8, 9, A, or B)