Can you extend a 30-day Visa in Thailand?

Yes, you can extend a 30-day entry stamp received through the visa exempt program while in Thailand. You can apply for a 30-day extension at an immigration office for a fee of 1,900 baht. It's important to note that the original stamp expiration date will be extended by an additional 30 days, so you don't need to wait until your stamp expires to apply for the extension.