Alcohol-free drinks [beers, ciders, wines, and spirits containing <0.05% alcohol by volume (ABV)], and low-alcohol drinks (between 0.05% and 1.2% ABV) are increasingly available and may be used as a harm reduction measure. However, it is not known what pregnant women think and feel about these drinks and how regularly they are consumed before and during pregnancy. A cross-sectional online survey was developed and piloted. Women ≥18 years in the UK who were pregnant, or recently pregnant, were recruited via targeted social media advertising. Of the 2092 respondents, 47.8% (n = 1001) were currently pregnant; 55.7% (n = 1167) were between 25 and 34 years, 90.0% were White (n = 1881); 6.1% (n = 128) were drinking alcohol at "increasing risk" levels (>14 units/week) before pregnancy. During pregnancy, 13.5% (n = 282) consumed alcohol, which was more common in the increasing risk category (P < .01). Alcohol-free or low-alcohol drinks were consumed by 71.3% (n = 1491) of respondents during pregnancy; 91.4% of the increasing risk category versus 69.9% of the lower risk category (P < .01). The most common reasons for consuming alcohol-free or low-alcohol drinks were "to choose a safer alternative" (71.9%, n = 1073) and "to feel included in social events involving alcohol" (68.8%, n = 1026). More than half of respondents (56.7%) thought there was insufficient information available about consuming alcohol-free and low-alcohol drinks during pregnancy, with internet searching the primary source of information. Although alcohol-free and low-alcohol drinks are commonly consumed during pregnancy, there are some safety concerns. Their role as a harm reduction measure in those who are drinking alcohol at increasing risk levels prepregnancy needs further investigation.