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
e538c5b5-222f-4f73-a7de-3db38e5dc1d0
a59964f3-c20a-4fe3-b944-870414ecde7b
ad40db4e-5e38-4212-8c5e-42496298fbf5
1a727698-ce08-4641-a91d-c9f55611b72f
9d97d1bb-a53e-4463-8751-17048e5b83cb
Validate UUID

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