Born in Chicago, Hall graduated Francis W. Parker High School in 1993. In 1994, while a student at Swarthmore College, Justin started his web-based diary Justin’s Links from the Underground, which offered one of the earliest guided tours of the web. Over time, the site came to focus on Hall’s life in intimate detail. In December 2004, New York Times Magazine referred to him as “the founding father of personal blogging.”

In 1994, during a break from college Hall joined HotWired, the first commercial web magazine started within Wired magazine. There, he began a long-term working partnership with critic, writer and teacher Howard Rheingold. Later Hall would become a freelance journalist covering video games, mobile technology and internet culture. He published analysis from game conferences such as E3 as well as the Tokyo Game Show. He chronicled the first Indie Game Jam in 2002. From late 2001 and 2003, Hall was based in Japan, mostly Tokyo and Akita, authoring a guidebook Just In Tokyo.

In 2007, Hall graduated from the MFA program in the USC Interactive Media Division. His thesis project was an attempt to make surfing the web into a multiplayer game: PMOG, the Passively Multiplayer Online Game. Hall went on to serve as CEO of GameLayers, which raised $2 million to turn PMOG into The Nethernet, a MMO in a Firefox toolbar. The Nethernet failed to turn a profit, and GameLayers closed down as a company. The server and client software for the Nethernet was released as open source and Hall went on to publish A Story of GameLayers, “open-sourcing our business process”.

At present, Hall lives in San Francisco, California. He served as a Producer on ngmoco:)’s Touch Pets series, and then became ngmoco:)’s Director of Culture & Communications. After working for ngmoco:)’s parent company DeNA as a Recruiter, Hall left the company in mid-2013. In 2015 he released a self-produced short documentary Overshare: the Links.net Story exploring his “extremely personal blogging”. . In September 2017, Hall began work as co-founder & Chief Technology Officer for bud.com, a California benefit corporation delivering recreational cannabis, built on a domain he registered in 1994.