UUID Generator

v4 identifiers locally.

Theme

Private by design: This tool runs in your browser — your data is not uploaded.

How to use UUID Generator

Generate RFC 4122 version 4 UUIDs for database keys, test fixtures, or API mocks — copy one or bulk-generate up to 50.

Step-by-step

  1. Choose how many UUIDs you need.
  2. Click Generate.
  3. Copy the list.

Common questions

Are UUIDs unique?
v4 UUIDs are random with extremely low collision probability for practical use.
Are UUIDs sent to your server?
No. crypto.randomUUID runs locally in your browser.

Last updated: 2026-06-03