Generate cryptographically secure UUID v4 and ULID (Universally Unique Lexicographically Sortable Identifier) identifiers in bulk — copy as JSON array, CSV, or plain list.
🚀 Launch Free Tool →✅ UUID v4 (RFC 4122 compliant)
✅ ULID (sortable unique IDs)
✅ Bulk generation (up to 1000)
✅ Copy as JSON, CSV, or list
✅ Web Crypto API — truly random
A UUID (Universally Unique Identifier) is a 128-bit identifier formatted as 8-4-4-4-12 hex groups (e.g., a1b2c3d4-...). UUID v4 is randomly generated and statistically guaranteed to be unique.
UUIDs are random and non-sortable. ULIDs are timestamp-prefixed and lexicographically sortable, making them better for database primary keys where chronological ordering matters.
Yes. This tool uses the browser's Web Crypto API (crypto.randomUUID) which generates cryptographically secure random values.