Can a 45-day tourist visa be converted to a Non-O visa in Thailand?

A 45-day tourist visa can potentially be converted to a Non-O visa, but this is subject to the discretion of the local immigration office and the remaining time on the visa stamp. Typically, it has been easier to process in the UK, but updates suggest it may now be possible locally, specifically in Hua Hin (HH). It's important to note that the possibility largely depends on the reasons for obtaining the Non-O visa, such as marriage to a Thai citizen, being a parent of a Thai child, or retirement.