On Windows, self-signed certificates can be created using the [New-SelfSignedCertificate PowerShell cmdlet](/powershell/module/pkiclient/new-selfsignedcertificate?view=win10-ps). For an unsupported example, see [UpdateIISExpressSSLForChrome.ps1](https://github.com/dotnet/AspNetCore.Docs/tree/master/aspnetcore/includes/make-x509-cert/UpdateIISExpressSSLForChrome.ps1).