LeetSmith

AI coaching for LeetCode: hints, code review, and explanations that teach you - without ever handing over the full solution.

Stuck on a LeetCode problem? Most tools just hand you the answer. LeetSmith makes you better. It mentors you from a side panel right next to the problem you're working on, and it's built on one stubborn principle: it will teach you, nudge you, and challenge you, but it will not hand over the full solution. Because copying an answer only gets you a green checkmark, understanding it gets you the job. Everything it says is grounded in the exact problem on your screen. Here's what you can reach for: • Progressive hints — three levels, from a gentle "here's how to think about it" to the approach to the implementation details. • Analyze my code — it reads the code already in your editor and tells you what's working, where your time and space complexity actually land, and how your style holds up, all before you submit. • Understand the solution — when you've earned it, a crystal-clear breakdown of why the optimal approach works: the key insight, a real-world analogy, and complexity explained line by line. • Study-note reports — turn a problem you've cracked into a tidy write-up you can save and review before your next interview. • Or just ask — type whatever's on your mind ("what pattern is this?", "why is this O(n log n)?") and LeetSmith routes you to the right kind of help. Anything that would reveal the answer asks you to confirm first, so you're never one careless question away from spoiling it. Free, and genuinely yours. LeetSmith runs on your own free Google Gemini key: no subscription, no sign-up, no catch. And it's private by design as LeetSmith does not store or collect your data. Your key, your notes, your progress all stay in your browser. Plus, you also get per-problem history that persists across sessions, a dark and light theme, and dial-it-yourself limits for the free tier — rate caps, a token budget, a usage meter, and a kill switch for when you want to go heads-down on your own. LeetSmith is an independent project and is not affiliated with, endorsed by, sponsored by, or produced by LeetCode. "LeetCode" is a trademark of its respective owner.