A method of securing user data provided through a webpage includes receiving an electronic file defining a webpage displayable by a computer. The webpage is initially configured to present an input field for receiving user data from a user, and instruct the computer to transmit the user data to a defined server. The method includes executing code that causes the computer to reconfigure the webpage to present a replacement field for receiving the user data from the user instead of the input field; and upon receiving user data in the replacement field, transmit said user data to a secured server instead of the defined server. The secured server may tokenize the data. The computer receives token data from the secured server; and transmits the token data instead of the user data to the defined server.