The official website for the U.S. Department of State Bureau of Consular Affairs, Travel.State.gov, publishes visitor visa application forms in PDF format, as of 2015. The visitor visa application requires Adobe Acrobat reader to view and is printable.
The application for a visitor visa is form DS-160: Online Nonimmigrant Visa Application, notes the Bureau of Consular Affairs. To access it, interested parties hover over the Tourism & Visit tab from the home page of the website and then click on the Forms link under Additional Information. This pulls up a clickable list of forms, including the DS-160 form. The website also offers information on how to apply for a visitor visa, including details about required documentation and fees.