An online prenup service refers to a digital platform that assists couples in preparing a prenuptial agreement through internet-based tools. In the United States, these services typically guide users through structured questionnaires that collect financial and personal information to generate legally formatted documents based on state requirements. A prenuptial agreement outlines how assets, debts, and financial responsibilities may be handled during marriage or in the event of divorce or death. Using an online prenup service allows couples to complete much of the document preparation remotely. However, the agreement must still comply with applicable state laws to be considered legally valid and enforceable.