Get-FileEncoding

Get-FileEncoding.ps1

function Get-FileEncoding
{
    [CmdletBinding()] Param (
     [Parameter(Mandatory = $True, ValueFromPipelineByPropertyName = $True)] [string]$Path
    )
 

    [byte[]]$byte = get-content -Encoding byte -ReadCount 4 -TotalCount 4 -Path $Path
 

    if ( $byte[0] -eq 0xef -and $byte[1] -eq 0xbb -and $byte[2] -eq 0xbf )
    { Write-Output 'UTF8' }
    elseif ($byte[0] -eq 0xfe -and $byte[1] -eq 0xff)
    { Write-Output 'Unicode' }
    elseif ($byte[0] -eq 0 -and $byte[1] -eq 0 -and $byte[2] -eq 0xfe -and $byte[3] -eq 0xff)
    { Write-Output 'UTF32' }
    elseif ($byte[0] -eq 0x2b -and $byte[1] -eq 0x2f -and $byte[2] -eq 0x76)
    { Write-Output 'UTF7'}
    else
    { Write-Output 'ASCII' }
}

# Usage:

# Get-ChildItem . -Recurse -File | select FullName, @{n='Encoding';e={Get-FileEncoding $_.FullName}} # | where {$_.Encoding -ne 'ASCII'}