UUID generator

Cryptographically random UUIDs via Web Crypto API. Nothing leaves your browser.

What works / what does not
✓ UUID v4 (random)✓ UUID v7 (time-ordered)✓ Batch up to 100 IDs✓ Uppercase and dashless format✓ Validate and detect version✗ UUID v1 (MAC-based)✗ ULID (separate tool later)✗ UUID v3/v5 with namespace
Version
Format
Generated
a18eb110-290d-4132-9cc1-28b97231481b
dfd965bd-0074-4843-b16b-aceea82a9d67
e0501ac5-8f70-4ccc-9632-8ddff435d6b6
5c481a2c-26d1-486e-bea6-4c164f42e1fb
812773f9-82cf-4562-8fe8-f6dbf50d15a5
Validate UUID

v7 is sortable by creation time — useful for database primary keys.