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
1e51f71c-ec73-421b-bef8-56c3c0d27bdf
572727a7-b06c-4834-af13-496b19ccc4da
4bbcd792-8278-4b34-8041-a0dc7b0d10fa
d7a7218b-53d4-4dcf-b5cc-48fdb09bec6e
bf7b502c-a3a0-4653-add9-e5674df3a660
Validate UUID

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