CodeCoach

Understand why your LeetCode solutions fail. Get clear feedback, gradual hints, topic badges and review reminders.

CodeCoach helps you understand why your LeetCode solutions fail. LeetCode tells you "Wrong Answer". CodeCoach tells you why. It reads your code and the failing test case, then explains the real reason: a wrong approach, a bug in the implementation, an edge case you missed, or a solution that's too slow. It sits in a small panel next to the editor, so you never have to leave the problem. What you get - Clear feedback on every failed submission Submit like you normally do. If it fails, you get a short explanation of what went wrong and what to try next. - Hints that don't give the answer away Stuck? Open hints one level at a time. The first one nudges you toward the idea, the second explains the algorithm, and the third gives you pseudocode. You decide how much help you want. - Checks on your current code Ask CodeCoach to review your approach and its time and space complexity, find edge cases your code doesn't handle, or answer any question about what you've written. - Topic mastery and Badge Tests See how strong you are in topics like Arrays, Graphs and Dynamic Programming. When you feel ready, take a timed Badge Test with two problems. Editorials, solutions and discussions are locked while it runs. Pass it to earn Bronze, Silver, Gold, Platinum and Diamond badges. - Better picks for what to solve next Recommendations focus on your weakest topics. You can filter by company (Google, Amazon, Meta and more) and choose up to 3 topics to focus on. - Reviews that make things stick Problems you solve come back for review after 3, 7 and 14 days, and you get a reminder when something is due. - Your full history in one click Import every problem you've already solved on LeetCode so your progress starts from day one. You can also export your solved problems to a CSV file with your own notes, or get a weekly summary of what you practiced. Fair play All AI features turn off automatically during LeetCode contests. Privacy There's no account or sign up. CodeCoach uses an anonymous ID stored in your browser. Your code is only sent for analysis when you use a feature, and your data is never sold or used for ads. The full privacy policy is linked on this page. How to start 1. Install the extension. 2. Open any problem on leetcode.com and the CodeCoach panel appears on the right. 3. Open the Sync tab and import your history (optional, but recommended). 4. Code and submit as usual. Questions or feedback? Write to codecoach.work@gmail.com CodeCoach is an independent project and is not affiliated with or endorsed by LeetCode.