Profile Locker

Lock your Chrome profile and Google Sheets with a 4-digit PIN, with easy and secure PIN recovery.

Keep your Chrome profile and your Google Sheets private, even on a shared computer. 🔒 LOCK YOUR CHROME PROFILE • Chrome starts locked: every tab shows a lock screen until you enter your 4-digit PIN • After unlocking you go straight back to the page you were opening • Auto-lock after a period of inactivity (1 minute to 2 hours) • Locks instantly when you lock Windows (Win+L) or close all Chrome windows • Lock any time from the toolbar or with Alt+Shift+L 📊 LOCK GOOGLE SHEETS • Protect only the sheets you choose, or every Google Sheet • One click: open a sheet → toolbar icon → "Lock this sheet" • Works even while the profile is unlocked, as an extra layer for sensitive sheets • Optionally re-lock a sheet as soon as its tab is closed 🔑 NEVER GET LOCKED OUT: EASY PASSWORD RECOVERY Forgot your PIN? You have three ways back in: 1. Recovery key: a 24-character key you download during setup 2. Security questions: answer two questions you chose 3. PIN hint: a reminder shown on the lock screen After a recovery you get a brand-new recovery key, and the old one stops working. 🛡️ BUILT FOR PRIVACY AND SECURITY • Your PIN, recovery key and answers are stored only as salted PBKDF2-SHA256 hashes, never in plain text • Brute-force protection: increasing wait times after repeated wrong PINs, and easy PINs like 1234 are blocked • The sheet PIN is typed in an isolated extension frame that web pages cannot read • No account, no servers, no analytics, no tracking: everything stays on your computer ⚙️ SIMPLE SETUP A 3-step wizard: create a 4-digit PIN, choose security questions, save your recovery key. Done. Note: Profile Locker is a privacy screen for your browser. To control who can open a Google Sheet, also use Google's Share settings. To lock Incognito windows too, enable "Allow in Incognito" for the extension.