Professional UUID Generation Tool RFC 4122 Compliant · Full v1-v7 Support · 2M+ Daily Generations UUID Version v1 - Time + MAC Address v3 - MD5 Hash v4 - Random v5 - SHA-1 Hash v6 - Time-Ordered v7 - Time + Random Namespace UUID Name Number of UUIDs (1-50) Format Options Lowercase Uppercase Include Hyphens Generate UUIDs Generated Results Copy All Understanding UUIDs UUIDs (Universally Unique Identifiers) are 128-bit numbers with: Global uniqueness: Collision probability <1/2122 Multiple generation methods: Timestamp, random, hashing Standard compliance: RFC 4122 & ISO/IEC 9834-8 Complete Version Guide Technical Notes: v1-v5: RFC 4122 Standards · v6/v7: Draft Specifications Timestamp versions (v1/6/7) contain date information Hash versions (v3/5) require namespace UUID + name Technical Standards Strictly compliant with: RFC 4122 Specification ↗ ISO/IEC 9834-8:2008 International Standard ITU-T X.667 Recommendation
Understanding UUIDs UUIDs (Universally Unique Identifiers) are 128-bit numbers with: Global uniqueness: Collision probability <1/2122 Multiple generation methods: Timestamp, random, hashing Standard compliance: RFC 4122 & ISO/IEC 9834-8