Free UUID Generator Online

Generate cryptographically random UUID v4 identifiers (RFC 4122). Single UUIDs or bulk up to 1000 at a time, all in your browser.

Try this example

You need 50 unique IDs to seed test data in a database, and you want them all in one paste-friendly list.

Steps
  1. 1In bulk mode, type 50 in the count field.
  2. 2Click Generate List. 50 UUIDs appear.
  3. 3Click Copy to copy them all to your clipboard, then paste into your SQL INSERT, CSV, or JSON.
Expected result
a3f2d1e4-7b9c-4f5a-9d8e-1c2b3a4d5e6f
b4f3e2c5-8a0d-4e6b-ae9f-2d3c4b5a6e7f
c5f4e3d6-9b1e-4f7c-bf0a-3e4d5c6b7a8f
... (47 more)

How to use

  1. 01A UUID is generated for you on page load.
  2. 02Click Generate New for a fresh one, or use bulk mode for multiple at once.
  3. 03Copy individual UUIDs or copy the entire list with one click.

FAQ

What is UUID v4?▼

UUID v4 is a 128-bit identifier generated from random numbers, defined by RFC 4122. The collision probability is so low that you can generate billions per second for centuries before expecting a duplicate.

Are these UUIDs cryptographically secure?▼

Yes. The tool uses the browser crypto.getRandomValues() function, which is suitable for security-sensitive use.

How many UUIDs can I generate at once?▼

Up to 1000 in a single batch. For larger volumes, generate multiple batches.

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