Visa rules are exactly the kind of detail that changes over time, so this page is deliberately an overview of the categories that exist rather than a fixed set of numbers likely to go stale.
Tourist visas / visa exemptions
Cover leisure travel only, for a fixed maximum stay — not intended to cover working, including remote work for a foreign employer, even informally.
Longer-term visa categories
Thailand offers several longer-stay visa categories aimed at retirees, investors, and more recently remote workers and digital nomads specifically — eligibility requirements and durations vary and are updated periodically.
Work permits
Formal employment in Thailand, including for a Thailand-based employer, generally requires a work permit tied to a specific employer — a separate process from the visa itself.
Because these categories and their requirements change, always confirm current rules directly via the Thai embassy or consulate in your home country, or Thailand's official immigration bureau, before making plans around a specific visa category.