Base64 Encode and Decode UTF-8 Text in PowerShell

function ConvertTo-Base64Text {
    param([Parameter(Mandatory)][AllowEmptyString()][string]$Text)
    [Convert]::ToBase64String([Text.Encoding]::UTF8.GetBytes($Text))
}
function ConvertFrom-Base64Text {
    param([Parameter(Mandatory)][AllowEmptyString()][string]$Base64)
    try {
        $bytes = [Convert]::FromBase64String($Base64)
        [Text.Encoding]::UTF8.GetString($bytes)
    } catch {
        throw "Invalid Base64 input: $($_.Exception.Message)"
    }
}