Export-SPWebParts.ps1

Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue
 
function EnsureDirectory($exportFolderPath) {
    if (-not (Test-Path $exportFolderPath)) { 
        New-Item $exportFolderPath -Type Directory | Out-Null 
    }
}
 
function ExportAllWebParts($siteUrl, $pageUrl, $exportFolderPath) {
    $web = Get-SPWeb $siteUrl
    $wpm = $web.GetLimitedWebPartManager($pageUrl, [System.Web.UI.WebControls.WebParts.PersonalizationScope]::Shared)
 
    EnsureDirectory $exportFolderPath
 
    $wpm.WebParts | ForEach-Object {
        $wp = $_
        $wp.ExportMode="All";
        $exportPath = $exportFolderPath + "\" + $wp.Title + ".xml"
        $xwTmp = new-object System.Xml.XmlTextWriter($exportPath,$null);
        $xwTmp.Formatting = 1;#Indent
        $wpm.ExportWebPart($wp, $xwTmp);
        $xwTmp.Flush();
        $xwTmp.Close();
    }
}

# Example: ExportAllWebParts "http://www.contoso.com" "pages/default.aspx" "c:\temp"
ExportAllWebParts "{site-url}" "{rel-page-path}" "{output-dir}"