UUID Generator

Bulk-generate random UUID v4 identifiers with one click. Generate up to 100 random UUID v4 identifiers at once. Uppercase, braces and no-hyphen formatting options. Free online UUID builder.

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À propos de UUID Generator

A UUID (universally unique identifier) is a 128-bit label that is, for practical purposes, guaranteed unique without any central coordination — which is why databases, APIs and distributed systems lean on it. This generator uses your browser's cryptographically secure random source (crypto.getRandomValues) to produce RFC 4122 version-4 UUIDs, in bulk, with formatting options for every convention: standard lowercase, uppercase, braces for Microsoft GUIDs, or hyphen-free compact form.

Comment utiliser UUID Generator

  1. Choose how many UUIDs you need.
  2. Pick a formatting option if your stack needs one.
  3. Click Generate.
  4. Copy a single UUID or the entire list.

Fonctionnalités clés

How unique is a random UUID really?
A v4 UUID has about 122 random bits. The chance of two ever colliding is so small you could generate a billion per year for centuries and still not expect a single duplicate.
What is the difference between a UUID and a GUID?
Practically none — GUID is Microsoft's name for the same 128-bit identifier. The braces format option exists for Microsoft-style GUIDs.

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