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UUID Generator

Generate one UUID v4 or a batch of up to 100 identifiers. Random values come from the browser's cryptographic generator.

Processed on your deviceFree · No account needed

Version 4 · Cryptographically random · Up to 100 per run

How to use it

  1. Choose how many identifiers you need.
  2. Generate version 4 UUIDs and copy the list.

A UUID has the form xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx.

Details & limits

1–100 UUIDs per run. UUID version 4 uses browser cryptography; uniqueness is probabilistic.

Are these suitable for authentication tokens?

UUIDs are identifiers, not a complete authentication design. Version 4 provides 122 random bits, generated with browser cryptography. Collisions are extraordinarily unlikely but not mathematically impossible.

Random UUIDs for development and test data

Each result uses the UUID version 4 layout with the required version and variant bits. Choose a batch size from 1 to 100 and copy the identifiers into your workflow. UUID uniqueness is probabilistic, not a promise that the generator has checked every existing ID. This tool generates identifiers; it does not create database records or accounts.

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