UUID Generator

UUID Generator

Number of UUIDs
Generated UUID
Version: UUID v4
Format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. UUID v4 generates random identifiers with an extremely low probability of duplicates, making them perfect for database keys, session IDs, and distributed systems.

How to Use UUID Generator

  1. Set quantity - Choose how many UUIDs you want to generate (1-100)
  2. Click generate - Press the generate button to create your UUIDs
  3. Copy results - Click the copy button to copy all generated UUIDs
  4. Regenerate - Click again to generate new random UUIDs

UUID Generator Features

  • UUID v4 standard - Generates RFC 4122 compliant version 4 UUIDs
  • Bulk generation - Generate up to 100 UUIDs at once
  • Cryptographically secure - Uses browser crypto API for randomness
  • Standard format - Output in xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx format
  • One-click copy - Copy all generated UUIDs instantly
  • Save preferences - Remembers your last used quantity

Frequently Asked Questions

What is the probability of duplicate UUIDs?

The probability of generating duplicate UUID v4 is extremely low - approximately 1 in 2.71 quintillion. For practical purposes, you can assume UUIDs are unique.

What is UUID v4?

UUID v4 is a version of UUID that generates random identifiers. The '4' in the version field indicates random generation, with 122 bits of randomness.

Can I use these UUIDs in production?

Yes, the UUIDs generated here are cryptographically secure and suitable for production use. They use the browser's crypto.getRandomValues() API for randomness.