As a traveler, you can stay in Thailand without a visa for up to 30 days if you arrive via air, and 15 days if you enter by land. However, these durations apply to travelers from eligible countries only. It's important to check your country's visa regulations to confirm your specific requirements before planning your trip to Thailand. Keep in mind that visa exemption policies are subject to change, so always verify with the nearest Thai Consulate or Embassy for the most up-to-date information.