Joe Hewitt is an American software programmer who is best known for his work on the Firefox web browser and related software development tools like Firebug and DOM Inspector.

Hewitt created the website Feff World with Douglas Palermo.

In July 2007, Hewitt led the release of the iUI user interface library which greatly simplified Safari development for Apple's iPhone.

[7] In November 2009, Hewitt ceased development on the application, citing Apple policies.

[9][10] This article about a United States engineer, inventor or industrial designer is a stub.