Indonesia said Thursday it would launch investigations into Google after the technology giant allegedly refused to cooperate with the country's tax department, an official said.

Google has denied the allegations, declaring it had paid all taxes in Indonesia since opening its Jakarta offices in 2011.

The government has repeatedly asserted the California-based company had outstanding tax issues to resolve.

Muhammad Haniv, a senior official with Jakarta's tax office, said Google had refused a request to allow tax officials to examine its financial statements.

"We are now elevating this to an investigation, because they refused to be examined. This could be classified as a criminal offence," Haniv told AFP, adding Google generates tens of millions in advertising revenue but contributed little in tax.

In a statement Jason Tedjasukmana, the head of corporate communications for Google Indonesia, said the company had always worked closely with the government and had "complied by paying all taxes which apply in Indonesia".

Jakarta has also applied pressure to other foreign tech behemoths such as Facebook and Yahoo over their tax arrangements inside Indonesia.

Global tech businesses have flooded Indonesia in recent years to capitalise on the exploding number of internet users in the Southeast Asian nation, which has an enormous youth population adept at using smartphones.

A third of Indonesia's 255 million have access to the internet but analysts say that number is likely to increase as connectivity improves across the sprawling archipelago.