Leetcode Calendar is a free Chrome extension designed to enhance your coding practice by visually displaying your Leetcode submission history as a heatmap/calendar. Every time you open a new tab, this minimalist tool reminds you of your progress, encouraging you to maintain a consistent practice schedule. It is particularly useful for those who tend to procrastinate or forget to allocate time for daily coding challenges.

The extension offers several features, including the ability to display data for any Leetcode username and view submission history for both the current year and the previous 365 days. Users can toggle the visibility of title text and choose between green and orange colorways for a personalized experience. Additionally, the extension provides tooltips for detailed daily submissions and allows user feedback submission directly within the tool.