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
fedfd025-04c1-4efe-93f5-8c9c21a47752
6b066d56-fa90-42f5-91e2-f46bc7b2172d
52ca5cdf-c4cc-460d-b146-8ae77270b361
ab6830f1-d961-479b-ab7f-2eb2927d49da
d1686ef5-d0d0-45fd-8db0-02cfd9af3ff4
Validate UUID

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