As Per Qatar Airways Visa information.

Visa-free arrival for Indian nationals…

Citizens of India can be granted a visa waiver for a period of 30 days on their arrival in the State of Qatar, given the following conditions.

• The passenger’s passport must be valid for at least 6 months.
• The passenger must have a confirmed return ticket.
• The passenger must have a valid debit or credit card (For a family travelling together, the card must be in the name of the passenger or one per family)
• Passengers should provide a confirmed hotel reservation.

Yes it is extendable for 1 more month, but after the entry. Last week I have extended... one more month.