Enable Save a publishing site collection as template and save site as template url in SharePoint 2013.

In this article , Enable save as template page
#Get site url 

$web = Get-SPWeb http://peakfinders/
$web.AllProperties["SaveSiteAsTemplateEnabled"] = "true"
$web.Update() 
 Now you can able  access the save site as template :

/ _layouts/savetmpl.aspx