You can get a HDFC instant personal loan by either visiting any of their branches which are spread across the country. You can also visit their website and apply for a paperless personal loan.
You can log on to HDFC's online web portal and check their net banking section. After you enter your login credentials, you can get all your personal loan details online.
You will be notified by HDFC when you get a pre approved personal loan. In such cases, your approval is already being given by the Bank. All you need to do is check how much amount is being given. You can get a pre approved loan on the go, sitting at home too.