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
e3fe2a42-d5a0-49ca-85b5-cf72e775b36b
f8cf1a75-14ff-4683-b245-b0747e77c234
b8caa108-214a-4b99-a439-fe1ebbf78f19
1caea419-1b5b-4db6-b654-63987e9ae273
80257c84-d211-4482-9663-70a2dc2fec5d
Validate UUID

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