A system and method for automatically completing one or a plurality of computer forms is disclosed using personal data from a local source. The form completion tool is initiated by a user to automatically complete in the one or multiple forms using personal data and code stored in user's personal computing devices. The personal data is independent of source of forms, obtained from the user with their authorization, and stored in a predefined format on the personal computing device. The code is independent of personal data and specific to each source of forms. The form completion tool may encrypt and decrypt the personal data when needed using an authentication technique to assure the identity and authority of the user to read or write the personal data.