BOJ Tier is a Chrome extension developed by jeehak0210 that provides a convenient way to view the difficulty level of recommended problems on Baekjoon Online Judge. This extension is a valuable tool for users of Baekjoon Online Judge who want to gauge the difficulty of the problems they are working on.

With BOJ Tier, users can easily see the difficulty level of recommended problems without having to navigate to each problem individually. This saves time and allows users to quickly identify which problems are suitable for their current skill level.

The extension is free to use and falls under the category of Browsers, specifically Add-ons & Tools. It is a useful resource for Baekjoon Online Judge users who want to optimize their problem-solving experience by efficiently selecting problems of appropriate difficulty.