UUID Generator

Generates version 4 UUIDs (Universally Unique Identifiers) — 128-bit values built almost entirely from cryptographically random bits — formatted as the standard 36-character string with hyphens.

Set how many UUIDs you need, from a single one to a large batch, and click generate; copy the full list with one click, one UUID per line.

A generated UUID v4 looks like `f47ac10b-58cc-4372-a567-0e02b2c3d479`: 32 hex digits arranged in groups of 8-4-4-4-12, separated by hyphens, for 36 characters total.

A version 4 UUID has 122 random bits (6 of its 128 bits are fixed to mark the version and variant), giving roughly 5.3 x 10^36 possible values — even generating billions of UUIDs per second, the chance of ever producing the same one twice by accident is negligible.

UUIDs are commonly used as database primary keys, API resource identifiers, session identifiers, and file or object names, specifically because they can be generated independently on different machines without a central coordinator and still remain unique.

This generates standard random (v4) UUIDs only, not time-ordered (v1, v6, v7) or name-based (v3, v5) variants, and it does not check the generated values against any existing database for additional collision protection — that responsibility stays with your application.

Generation happens entirely in your browser using the Web Crypto API; no identifiers or requests are ever sent to a server.