The phrase "with no strings attached" means that something is provided or given without any conditions or obligations. Some synonyms for this phrase include "unconditional", "unencumbered", "unrestricted", "gratis", "complimentary", "generous", "free of charge", "purely", "simply", "open-handed", "gratis", "on the house" and "freely". These words convey a sense of freedom and generosity, indicating that something is given or provided freely, with no expectations or demands made in return. Whether talking about a gift, a favor, or some other kind of gesture, using these synonyms can help to emphasize the absence of any obligations or strings attached.