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Utilora

Free Bulk UUID/GUID Generator

Developer Tools

Generate up to 1000 at once.

What is Free Bulk UUID/GUID Generator?

UUID Generator creates universally unique identifiers (UUIDs) based on version 4 of the UUID standard. A UUID v4 is a 128-bit number formatted as 32 hexadecimal digits grouped in 5 sections separated by hyphens (e.g., 550e8400-e29b-41d4-a716-446655440000). These are generated using cryptographically secure random numbers, making collisions effectively impossible - there are more possible UUIDs than atoms in the observable universe.

How it works

UUIDs are generated using the browser's crypto.randomUUID() API, which produces a cryptographically secure random 128-bit number formatted as 32 hex digits in 5 groups separated by hyphens. The format matches RFC 4122 v4 UUIDs: version 4 (random) and variant 1 (RFC 4122). Hyphens are stripped and case toggled in the browser for alternate formats.

Features & Benefits

  • Instantly generates mathematically secure v4 UUIDs
  • No limit on usages, runs strictly client-side

Frequently Asked Questions

Is this secure?

Yes. It uses the crypto.randomUUID() Web API natively inside your browser. No strings are ever transmitted.

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