RapidCheck

UUID Generator (v4)

Generate random version-4 UUIDs instantly.

Last updated: 12 Aug 2026

Quick answer

Tap Generate to create a random version-4 UUID like 3f2504e0-4f89-41d3-9a0c-0305e82c3301 — a 128-bit unique identifier used in software and databases. Choose how many you need; they are generated in your browser.

Generate random version-4 UUIDs (universally unique identifiers) for use as IDs in apps and databases. Pick a count and copy the results.

How to generate a UUID

  1. 1 Choose how many UUIDs you need.
  2. 2 Tap Generate.
  3. 3 Copy the generated UUIDs.

Frequently asked questions

What is a UUID?
A 128-bit universally unique identifier, usually shown as 32 hex digits in five groups (8-4-4-4-12).
What is UUID v4?
A UUID generated from random numbers, the most common type for general-purpose unique IDs.
Are these UUIDs unique?
The chance of a collision is astronomically small, so they are treated as unique in practice.

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