UUpayaTools

Developer Tools

UUID Generator

Generate RFC 4122 version 4 UUIDs in bulk, instantly.

Uses crypto.randomUUID() in your browser.

About this tool

Create cryptographically strong version 4 UUIDs for database keys, correlation IDs, and testing fixtures — entirely in your browser.

How to use

  1. Choose how many UUIDs to generate (1–100).
  2. Click Generate.
  3. Copy or download the list.

Examples

  • Generate primary keys for seed data.
  • Create request IDs for API tests.
  • Mint unique filenames for uploads.

Benefits

  • Crypto-quality randomness
  • Bulk generation
  • Download as text
  • No server round-trip

Frequently asked questions

Which UUID version is generated?+

Version 4 (random) via crypto.randomUUID() in supporting browsers.

Are UUIDs unique?+

Collisions are astronomically unlikely for v4 UUIDs in normal use.

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