UUID v4
Generate random UUIDs using cryptographically secure algorithms
Features
Cryptographically secureRandom generationMost commonRFC 4122 compliant
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UUID Generator
Generate unique identifiers for databases, APIs, and applications
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UUID v7
Generate time-ordered UUID v7 identifiers with Unix timestamp for lexicographic sorting
Features
Time-orderedLexicographic sortingUnix timestampModern standard
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UUID v6
Generate time-based UUID v6 identifiers with reordered timestamp fields for better sorting
Features
Time-basedBetter sorting than v1v1 compatibleChronological
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UUID v5
Generate deterministic UUID v5 identifiers using SHA-1 hash of namespace and name
Features
Name-basedSHA-1 hashDeterministicSecure
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UUID v3
Generate deterministic UUID v3 identifiers using MD5 hash of namespace and name
Features
Name-basedMD5 hashDeterministicLegacy support
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UUID v1
Generate timestamp-based UUIDs with MAC address components
Features
Timestamp-basedSortableMAC addressSequential
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NIL UUID
Generate NIL UUID (Null UUID) - a special identifier consisting of all zeros
Features
All zerosNull referenceRFC compliantSpecial value
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GUID
Generate Microsoft-style GUIDs (same format as UUID v4)
Features
Microsoft format.NET compatibleWindows standardSame as UUID
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