Catalyzes the conversion of sulfated steroid precursors, such as dehydroepiandrosterone sulfate (DHEA-S) and estrone sulfate to the free steroid. {ECO:0000269|PubMed:10844566, ECO:0000269|PubMed:23466819, ECO:0000269|PubMed:9252398}. This is the function of STS (steroid sulfatase, ENSG00000101846).