Koh Tao, is generally safe for solo female travelers. However, safety can largely depend on personal vigilance. The island is known for its friendly locals and tranquil atmosphere, but still, it is important to exercise caution. Petty crimes like pickpocketing can be an occasional occurrence. Always make sure to secure your belongings, avoid isolated areas at night, and use only licensed taxis or transport services. Overall, with the right precautions, a trip to Koh Tao can be a memorable experience.