Can I get a new 30-day visa for Thailand by briefly visiting Laos?

Yes, you can visit Laos for a short period and then return to Thailand to receive a new 30-day visa exemption if you hold a passport from a country on the visa exemption list. This can even be done quickly, such as within 20 minutes at the border. However, you can only do this up to two times a year at land borders. Additionally, if you haven't already extended your initial 30-day stamp, you can apply for a 30-day extension at your local immigration office without needing to leave Thailand.