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UUID generator

Generate cryptographically secure RFC 4122 v4 UUIDs.

Quick presets

0

About UUIDs

A UUID (Universally Unique Identifier) is a 128-bit value used as a unique key in databases, APIs, and file systems. Generation runs entirely in your browser using crypto.randomUUID.

  • v4 UUIDs are random, not sortable.
  • 36 chars with hyphens, 32 without.
  • Collisions are mathematically negligible.
  • Prefer UUIDv7 if you need time-ordered IDs.