No Peek: Solution Lock & Timer for LeetCode

Hide previous solutions and improve problem-solving discipline.

Stop reaching for the editorial three minutes in, and stop forgetting problems you "solved" a month ago. No Peek locks the Editorial, Solutions, your past Submissions and the Discussion section on any LeetCode problem until you've spent a think time you choose on it. Then it tracks how you solved it and brings it back later for a blind re-solve, so the pattern actually sticks. LOCK THE ANSWERS • Click "Start solving" on any problem to start its timer. • Opening a locked section, by its tab or by typing the URL directly, shows a lock screen with the time left. • Strict mode (on by default): no way to unlock early. Turn it off to get a two-click "Reveal anyway" button. • Pause and restart can only delay the unlock, never skip it. • Counts solving time, not wall-clock time. Switching tabs, minimising the window or moving to another problem pauses the clock. START CLEAN • A fresh attempt resets the editor to the default template, so your old solution isn't staring back at you. • If the editor already has code, from another device or an earlier attempt, nothing is touched until you choose "Start fresh" or "Keep my code". • Your submissions on LeetCode are never changed, and submitting still shows you the result. RE-SOLVE WHAT YOU LEARN • No Peek notices when your submission is Accepted, records your solve time, and schedules the problem to come back. • Solve it blind and the gap grows: 3, 7, 14, 30, 60, then 120 days. Peek before solving and it comes back tomorrow. • The toolbar icon shows how many problems are due today. • When you reopen a problem, the start card tells you how you did last time. SEE YOUR PROGRESS A dashboard shows problems solved, how many you solved without peeking, your median solve time, your slowest topics, a breakdown by difficulty, and your recent attempts. Export your history as a file to back it up or move it to another computer, or delete it any time. ALWAYS IN VIEW • A countdown pill on the page with pause and restart buttons. • Minutes left on the toolbar icon (amber while paused, a green check once unlocked). • A popup with a live countdown, re-solves due, and all settings. SETTINGS • Think time: 1 to 180 minutes (default 30) • Strict mode: on or off • Reset code on start: on or off • Enabled: master switch PRIVACY Runs only on leetcode.com. Your practice history stays in your browser, and settings sync through your Chrome account like any extension's settings. Nothing is collected, and nothing is sent to the developer or anyone else. Full policy: github.com/AnantDuhan/Leetcode-Blind-Practice-Extension/blob/main/PRIVACY.md No Peek is free and open source: github.com/AnantDuhan/Leetcode-Blind-Practice-Extension If it helps your practice, there's an optional way to support it from the dashboard. No Peek is an independent project and is not affiliated with or endorsed by LeetCode.