MaxJsonLength exception
MaxJsonLength exception in ASP.NET MVC4 during JavascriptSerializer: Code: public ActionResult Index(){ var data = null //give some large data e.g big list of values var resultData = Json(data, JsonRequestBehavior.AllowGet); resultData.MaxJsonLength = Int32.MaxValue; return resultData; } Note: Then web.config setting is ignored by the default JsonResult implementation. So we might need to implement a custom Json Result or we can use the above code.