Leet Lock is a free Chrome browser extension designed to boost productivity by enforcing a daily routine of solving LeetCode problems. This tool locks access to most websites, allowing only LeetCode and Google, until a user completes a problem. It aims to cultivate discipline in coding practice by making it mandatory to engage with coding challenges before browsing freely.

The extension offers a straightforward setup where users input their LeetCode username and initiate the lock. Once activated, any attempt to access websites other than the designated ones results in redirection. Users can unlock their browser automatically after solving a problem or opt for a manual unlock for a limited time each day. This combination of structured practice and limited distractions can help users improve their coding skills effectively.