Can we apply for a 30-day extension on our Thailand tourist visa before the last day of our 60-day stay?

The user inquired about the possibility of applying for a 30-day extension on their 60-day tourist visa before the final days of their current visa. Responses indicate that most immigration offices permit extensions to be submitted as early as 30 days prior, while some may have a shorter window of just 7 days. Additionally, it was clarified that the 30 days will be added to the existing visa stamp, allowing for an early application.