Yes, completely free with no signup or usage limit.

Are these UUIDs cryptographically random?

Yes â€” they're generated using the Web Crypto API's secure random number generator, following the UUID version 4 format.

Are they sent anywhere?

No. UUIDs are generated entirely in your browser and never transmitted.

Generate random version 4 UUIDs, one at a time or in bulk.

How many?

12dd8936-db2d-45b8-a718-58bf1aed6b50

2d1d938c-1583-426f-9989-3cc0026e31f6

ecc227ef-a5f5-4f71-87d0-3cf38b64346f

58b74c87-bff7-4c02-b03c-2405f508a4c1

8bea7c07-e95d-418d-96b6-7b211750c117

: Yes, completely free with no signup or usage limit.
: Yes â€” they're generated using the Web Crypto API's secure random number generator, following the UUID version 4 format.
: No. UUIDs are generated entirely in your browser and never transmitted.