Indonesia will soon allow tourists from an additional 30 countries to visit without a visa, a minister said, but neighbouring Australia was left off the list amid a row over looming executions.

The move comes as Jakarta seeks to boost a faltering economy, which is growing at five-year lows, and to attract more foreign income as the rupiah rapidly weakens.

The country currently only allows tourists from 15 countries, mostly in Southeast Asia, to visit without a visa. People from a number of other countries can buy a tourist visa on arrival.

The 30 countries added to the list are mainly European, but also include China and several others in Asia, the United States, and some nations in the Middle East and Africa, Tourism Minister Arief Yahya said.

"People who want to travel to Indonesia won't need to worry about a visa any more," Yahya said late Monday, as he announced the changes.

"We hope that we can attract an additional one million foreign tourists," he added, saying the policy could bring in an extra $1 billion a year and that he hoped it would come into effect next month.

Indonesia has long lagged behind its neighbours in attracting foreign visitors. In 2013, 8.8 million foreign visitors came to Indonesia, according to official figures, compared with 25.72 million in Malaysia and 26.55 million in Thailand.

But Yahya predicted that "in two years, we will beat those countries" following the introduction of the new policy.

Australia -- which accounted for more than 10 percent of Indonesia's foreign visitors in 2013 -- was not included in the list of countries whose citizens will no longer require a visa.

Ties between Indonesia and Australia have deteriorated in recent months as Jakarta prepares to execute two Australian drug traffickers on death row who were convicted of trying to smuggle heroin out of Bali.

Yahya denied the row had played a role, suggesting that Australia was excluded from the list because its own policy required visiting Indonesians to have a visa.

However, most of the 30 countries added to the list require Indonesians to obtain a visa before visiting.

"It's not that we do not want to include Australia," he said.

Though their country was not on Indonesia's visa-free list, Australian nationals can nevertheless purchase a tourist visa on arrival.

The minister also downplayed fears that Indonesia was ill-prepared for a huge jump in the number of tourists.

"We have calculated that if we have a 50 percent increase, our capacity is still more than enough," he said.

Indonesia's economy has been hard hit as investors withdraw funds and redirect them back towards more developed markets, which have recently been showing signs of renewed strength.

The economic woes have seen the rupiah sink to a 17-year low against the dollar in recent days.