Tourists from certain countries can stay in Indonesia without a visa for a specific period, depending on their nationality. Here are the details:

- Visa-free entry: Citizens of 169 countries, including the US, UK, Australia, and Canada, can enter Indonesia without a visa and stay for up to 30 days. This is valid for tourism, business, or transit purposes.
- Visa on Arrival (VOA): Citizens of 67 countries can get a VOA, which allows them to stay for up to 30 days. This can be extended once for an additional 30 days.

Please note that:

- The 30-day stay period starts from the date of entry.
- You must have a return or onward ticket and proof of sufficient funds.
- You cannot engage in work or other activities that violate the terms of your entry.
- You must exit Indonesia before the visa-free or VOA period ends to avoid overstaying penalties.

Check with the Indonesian Immigration website or consult the Indonesian Embassy or Consulate in your home country for the most up-to-date information on visa requirements and regulations.