Hello Share pointers, Here is the JSOM code to change SharePoint master page using Java script object model in Sharepoint 2013 and 2016. var context; var web; var MasterPageUrl = ‘/_catalogs/masterpage/mycustom.master’; context = new SP.ClientContext.get_current(); web = context.get_web(); web.set_customMasterUrl(MasterPageUrl); web.set_masterUrl(MasterPageUrl); web.update(); context.executeQueryAsync(function () { alert(“Master Page is” + sMasterPageUrl); }, function (sender, args) { alert(“Error: […]