In general, visa is required in Thailand but other national countries are not required to apply tourist visa when visiting the country. In compliance with the new visa exemption the list below is eligible to enter Thailand without visa through land border checkpoint for only twice a year. Entering the country with international airports won’t be affected by this regulation.
Nationals from other countries and territories are required to obtain their visa according to their purpose of their visit, mainly for these ASEAN Focused Cargo Network Event delegates are advised to have their tourist visa. A tourist visa is a 60-day visit in the country which in Thailand, it can be extended for up to another 30 days by means of a visa run. If you are planning to extend your visa, you can convert the visa to a Non-Immigrant Visa which will require you to go to the nearby city or country such us Penang and Kuala Lumpur, Malaysia.
For more reference about Thailand Visa, you can visit the following link below: