Systems and methods providing, by a third party, input form fields for sensitive data on a web page provided by an organization. A user may request a web page from an organization, such as a merchant's checkout web page, that requires entry of sensitive data. The merchant's checkout web page may include reference to a script file that provides hosted sensitive data form fields. In response to rendering the merchant web page in a web browser of the user, a request to provide sensitive data form fields on the merchant web page may be received. The request may include a call to a function in a scripting file provided by the third party, and the provided file may cause one or more inline frames to be rendered in the web browser, each inline frame including a sensitive data form field. Data entered by the user in the sensitive data form fields may be received by a third party payment processor device.