GUID V4 - Random-Based Identifier (Recommended)
GUID v4 is the most widely used random-based identifier. Learn about its structure, collision probability, advantages and why it is recommended for general-purpose applications.
How to Generate GUIDs in PowerShell
Generate GUIDs in PowerShell with [System.Guid]::NewGuid() for random values and with [System.Guid]::CreateVersion7() when the shell runs on .NET 9 or newer.
Recommendation: use
[System.Guid]::NewGuid() for random GUIDs and only use GUID v7 when your PowerShell environment runs on a .NET version that supports it.How to generate GUID v4 in PowerShell
$id = [System.Guid]::NewGuid()
$idHow to generate GUID v7 in PowerShell
$id = [System.Guid]::CreateVersion7()
$idThis requires .NET 9 or newer. In practice that means PowerShell 7.5+ can call the API, while Windows PowerShell 5.1 cannot.
Native support notes
- PowerShell inherits GUID APIs from .NET.
- GUID v4 is universally straightforward.
- GUID v7 is available when PowerShell runs on .NET 9 or newer.
Practical notes
- Prefer explicit runtime checks in automation scripts if GUID v7 is required.
- Use GUID v4 when scripts must run across mixed Windows and cross-platform PowerShell environments.
- See GUID v7 details before depending on sortable GUID semantics.
Frequently Asked Questions
PowerShell typically uses GUID terminology because it relies on .NET's
System.Guid type.[System.Guid]::CreateVersion7() requires .NET 9 or newer. That makes it available in PowerShell 7.5+ and unavailable in Windows PowerShell 5.1.Learn more
These articles expand on related concepts, formats and practical considerations.