Toolwise

UUID Generator

Generate cryptographically random, RFC-4122-compliant UUID v4 values, one at a time or in bulk.

How to use UUID Generator

  1. 1Choose how many UUIDs you want to generate.
  2. 2Click Generate to create new UUIDs instantly.
  3. 3Copy a single UUID or all of them at once.

About UUID Generator

A UUID (Universally Unique Identifier) is a 128-bit value used to uniquely identify information without a central authority. This tool generates version 4 (random) UUIDs using your browser's cryptographically secure random number generator.

Benefits

  • • Generate unique identifiers for database records, API keys or test data.
  • • Uses the Web Crypto API for cryptographically strong randomness.

Common mistakes

  • • Assuming UUIDs are sequential or predictable — v4 UUIDs are intentionally random.

Frequently Asked Questions

It's astronomically unlikely. UUID v4 has 122 random bits, giving a collision probability low enough to be considered practically impossible for normal use.

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