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
d010d0bb-9f1f-4ac4-8a56-1f7a1e33e49b
5c994f64-4ebd-417c-a1f6-2d621d61cc61
d154c4e9-c5a5-4c3a-9f95-57c6e1582238
c9bedeff-94b0-40a3-890e-4c1fd20ad687
3f05fd78-3652-4337-8844-855fd8d95a56
Validate UUID

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