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NuGet · #2608 most downloaded on NuGet
A fast and modern .NET library to generate UUID/GUID that are either sequential and database friendly (versions 7), name based (versions 5) or random (version 4).
Last release 6 months ago
04 Apr 2026
Ships fairly regularly
a new release about every 5 weeks
Nearly every release is documented
notes for 17 of 17 stable releases
1 version withdrawn
withdrawn after publishing
127 years old
24 releases · first in 1900
Fixed a very rare bug in UuidToolkit.CreateUuidV7FromSpecificDate (see #40)
UuidToolkit.CreateUuidV7FromSpecificDate (see #40)Added the list of known namespaces for UUID v5
One column per quarter.
Reduced memory allocation for name based UUIDs
Enabled strong naming + added source in nuget package
Added a method to UuidToolkit to create a SQL Server GUID (v8) with a specific timestamp (see #32)
Improved performance for UuidToolkit.CreateUuidV7FromSpecificDate
Fixed a crash on name based UUID (UUIDv5) on some inputs (see #31)
Improved random number generation performance. UUID V7 generation is now 1.7x faster, UUID V4 is 3x faster
Removed obsolete methods (this might cause breaking changes)
Nothing published for this version
Nothing published for this version
Nothing published for this version
Reduced the public surface of the library (this might cause breaking changes)
Nothing published for this version
Nothing published for this version
Nothing published for this version
Added PostgreSQL to the list of supported databases
Nothing published for this version
Added the ability to genereate UUID V8 taylored for Microsoft SQL Server
Greatly improved UUID V7 performance when generating a lot of UUID in batch
Updated UUID V7 format according to latest draft RFC
Fix handling of sequence overflow
Added Uuid.NewDatabaseFriendly static method
* First version
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