UUID Generator - Generate All UUID Versions (v1-v7)

Generate UUIDs of all versions (v1-v7) instantly. Supports timestamp-based, random, and namespace UUIDs with customizable formatting options. Generate up to 5000 UUIDs at once.

UUID Generation

Generated UUIDs

Generating UUIDs...

UUID Version Information

Version 1 (Timestamp-based): Uses MAC address and timestamp. Predictable but sortable. Leaks network identity.
Version 2 (DCE Security): Similar to v1 but with embedded POSIX UID/GID. Rarely used in practice.
Version 3 (Namespace MD5): Uses MD5 hash of namespace UUID and name. Deterministic output for same input.
Version 4 (Random): Uses cryptographically secure random numbers. Most commonly used version. 122 bits of randomness.
Version 5 (Namespace SHA1): Uses SHA-1 hash of namespace UUID and name. Deterministic, preferred over v3.
Version 6 (Reordered Timestamp): Like v1 but with reordered timestamp for better sorting. Doesn't leak MAC address.
Version 7 (Timestamp-ordered): Uses Unix timestamp for natural sorting. Newest standard (RFC 9562). Recommended for databases.

Need to verify an existing UUID? Use our UUID Verifier. Need to hash files or text? Use our File Hash Calculator.