Can I Extend a 30 Day Visa Exempt Entry in Thailand Without Leaving?

and we see how again the misuse of terminology throws answers off the rails.

There is NO such thing as a 30 day tourist visa, and as it was pointed out IF you as an Aussie passport holder winged your way here without having bought a visa from a thai consulate before hand and were stamped in for FREE for 30 days you got in on what's called a 30 day visa exempt entry.

You CAN apply for a 30 day extension on that at the immigration office in the area where you stay for 1900baht.

In Bangkok that is out at the government complex on Chaengwattana Road, Building B, second floor, south entrance.