"Do I need a visa?" 

          Generally, foreign nationals wishing to enter Thailand are required to obtain a visa from the Royal Thai Embassy or the Royal Thai Consulate-General. However, certain nationals are eligible for visa exemption or visa on arrival. For online VOA please visit https://thailandevoa.vfsevisa.com/thailand/online/home/index

          ***Foreign nationals entering Thailand on the Tourist Visa Exemption Scheme (30 days) may enter Thailand via land border only up to 2 times per calendar year (This limit does not apply to nationals of Malaysia, Brunei, Indonesia, and Singapore). There is no limit on the number of entries by air arrival***