LeetBook: AI Study Companion for LeetCode

Auto-track submissions, organize by patterns, and get AI-powered notes — your smart LeetCode notebook.

🚀 LeetBook — Your AI-Powered LeetCode Companion Stop losing track of your LeetCode progress. LeetBook automatically captures every accepted submission and builds a personal knowledge base — so you can focus on solving, not note-taking. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✅ AUTO-TRACK SUBMISSIONS Every accepted solution is captured instantly — code, language, runtime, memory, and timestamp. No copy-pasting. No manual logging. Just solve and go. Solving on another site? Add problems manually from Codeforces, HackerRank, GeeksforGeeks, or anywhere else. 🤖 AI-POWERED STUDY NOTES Get instant AI analysis on every submission: • Key algorithm patterns identified • Step-by-step dry-run walkthrough • Time & space complexity breakdown • Notes you can review anytime Powered by Groq or Google Gemini (bring your own API key — stored locally, never on our servers). 📝 RICH-TEXT NOTES Write your own notes in a clean editor — no markdown to learn. Paste from LeetCode and headings, lists, tables, and code blocks keep their formatting. Type # to link one of your submissions, like linking a work item; click the link to jump to it, or Ctrl/Cmd+click to open it on LeetCode. 🏷️ PATTERNS, TOPICS & TAGS Organize problems by 50+ algorithm patterns — Two Pointers, Sliding Window, Dynamic Programming, BFS/DFS, and more — plus your own topics and tags. See which patterns you've mastered and where you need practice. 🔍 SEARCH, SORT & EXPORT Query your problem library like a pro: • Filter by difficulty, pattern, topic, and tags • AND/OR logic with operators like "in", "not in", "contains", "is empty" • Save and reload your favorite views • Sort by last accepted, last modified, date created, title, or difficulty — your choice is remembered • Export exactly what you're viewing to CSV, ready for Excel or Google Sheets 📊 STATS & INSIGHTS Track your momentum — total solved, problems solved in the last 7 and 30 days, current and best streaks, difficulty mix, and your top patterns. 🌗 DARK & LIGHT MODE Beautiful Google Material design with full dark mode support. Follows your system preference or set it manually. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔒 PRIVACY FIRST • API keys are stored locally on your device — never transmitted to our servers • CSV exports are created in your browser and saved straight to your device • Sign in with Google — your data is yours • No ads, no tracking, no data selling 📖 HOW IT WORKS 1. Install & sign in with Google 2. Head to LeetCode and solve problems as usual 3. Open the LeetBook side panel to review your solutions, AI notes, and patterns Works in the side panel for quick access, or open in a full tab for a wider view. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Perfect for: • Interview prep • Competitive programming practice • Building a personal algorithm reference library • Reviewing and revising past solutions LeetBook — Solve smarter, not harder. 📚