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
4ba4ccda-c849-47d8-9b98-94c20916b3b6
60951780-7e53-402f-a748-22cbbe3620ed
d63343a8-88d3-4ada-82c9-0912b65e8e89
cf58186b-4aa7-4214-ace3-b0f424595ff7
ace32062-4609-49ef-b7c3-c3249cfaf77b
Validate UUID

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