There are different options for taking a food handler test online, including third party resources, online courses and state specific agencies that meet the certificate's stipulations. Every state that requires individuals to be certified has different time limits in place for completing the process.
Different organizations provide the online training and circulation and are location specific, as different states have varying requirements. Those looking for a specific course online should check with the local health requirements and ask at a job interview for the specifics that need to be met.
The website State Food Safety has a searchable database of all the states, links to tests recognized by the relevant Board of Health and the cost and details of the test.