If you have the Microsoft SDK, use the uuidgen.exe utility. Programming Environments: C#: Use Guid.NewGuid() to generate a 128-bit unique number.
Tools like GUIDGenerator.com allow you to create bulk GUIDs in various formats (hyphens, braces, uppercase). Windows (Command Line/PowerShell): AsCOW3zip
Use the NEWID() function during INSERT statements to automatically assign unique IDs to rows. If you have the Microsoft SDK, use the uuidgen
Run New-Guid to instantly create a random identifier. If you have the Microsoft SDK
Modern browsers support crypto.randomUUID() for cryptographically strong IDs.