Thailand's visa exemption allows tourists from eligible countries (like US, EU, Australia, Japan) to enter for tourism/short business for up to 60 days (extendable once by 30 days) with a passport valid 6+ months, proof of onward travel/funds (฿10k/person, ฿20k/family), and completing the Thailand Digital Arrival Card (TDAC) online before arrival. Land/sea entry might have stricter limits (e.g., 15 days, twice per year), so always check the latest official Thai Embassy/Consulate info for your nationality and entry method.