Batch convert multiple Word documents to pdf files with VBA

 Sub ConvertWordsToPdfs()
'Updated by Extendoffice 20181123
    Dim xIndex As String
    Dim xDlg As FileDialog
    Dim xFolder As Variant
    Dim xNewName As String
    Dim xFileName As String
    Set xDlg = Application.FileDialog(msoFileDialogFolderPicker)
    If xDlg.Show <> -1 Then Exit Sub
    xFolder = xDlg.SelectedItems(1) + "\"
    xFileName = Dir(xFolder & "*.*", vbNormal)
    While xFileName <> ""
        If ((Right(xFileName, 4)) <> ".doc" Or Right(xFileName, 4) <> ".docx") Then
            xIndex = InStr(xFileName, ".") + 1
            xNewName = Replace(xFileName, Mid(xFileName, xIndex), "pdf")
            Documents.Open FileName:=xFolder & xFileName, _
                ConfirmConversions:=False, ReadOnly:=False, AddToRecentFiles:=False, _
                PasswordDocument:="", PasswordTemplate:="", Revert:=False, _
                WritePasswordDocument:="", WritePasswordTemplate:="", Format:= _
                wdOpenFormatAuto, XMLTransform:=""
            ActiveDocument.ExportAsFixedFormat OutputFileName:=xFolder & xNewName, _
                ExportFormat:=wdExportFormatPDF, OpenAfterExport:=False, OptimizeFor:= _
                wdExportOptimizeForPrint, Range:=wdExportAllDocument, From:=1, To:=1, _
                Item:=wdExportDocumentContent, IncludeDocProps:=True, KeepIRM:=True, _
                CreateBookmarks:=wdExportCreateNoBookmarks, DocStructureTags:=True, _
                BitmapMissingFonts:=True, UseISO19005_1:=False
            ActiveDocument.Close
        End If
        xFileName = Dir()
    Wend
End Sub