Designing Pairing Codes: Tradeoffs, Mistakes, and a Simple Approach That Works

While building Booth Beam , a digital signage tool, I ran into a problem that looks trivial at first glance: how do you connect a TV to a web app in a way that’s fast, reliable, and hard to mess up? You could force users to log in on a TV, but anyone who has ever typed an email and password with a remote knows how painful that is. There’s a reason most modern apps avoid that entirely. The approach used by apps like Netflix is simple and effective: pairing codes. Instead of logging in directly on