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
148242fb-3906-4148-9787-68a9f3ef8b5d
07ca9f7f-cfe6-4b08-8db9-7c7408444e87
04062d97-b0a6-420d-82a5-9a2e982396fb
5aa69f33-587f-4ba9-a766-aabb4ccc2f40
c6b7f79c-e728-4b1d-b19c-e3693396d8b2
Validate UUID

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