Cover lock
A dedicated lock tab sits in front of each window. Background tabs keep URL, scroll, and form state when you unlock.
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Open source · Manifest V3
Chrome Profile Locker
Lock your Chromium profile with a PIN or password. Cover-tab locking keeps tabs loaded when you unlock. Everything stays on your device.
- Cover tab per window, no mass reload
- PBKDF2 hashes, optional TOTP, recovery code
- MIT licensed, zero telemetry
Built for real browsers
Privacy-first locking without reloading the tabs you already have open.
Local only
Salted hashes on device. No cloud accounts or analytics SDKs.
Optional 2FA
TOTP with bundled QR. One-time recovery code at setup.
Open source
Read every module. Automated tests on every push.
Lock model
Tabs stay exactly where you left them
Unlike approaches that reload or replace every tab, cover-tab locking puts a lock screen in front of each window. Unlock closes that tab and returns you to your session.
- Quick Lock shortcut (Alt+Shift+L default)
- Re-lock on browser start and idle timeout
- Local audit log and rate limiting
Cover tab · No reload
Security
Honest limits, local secrets
Secrets never leave your profile as plaintext. Still, anyone with full device access can disable extensions or use another OS. This tool deters opportunistic access; it is not disk encryption.
- PBKDF2 password/PIN hashing
- No network calls for extension logic
- Recovery code for forgotten PIN
On-device · Verifiable
Four steps
Set up
PIN/password, idle time, optional TOTP, save recovery code.
Lock
Startup, idle, new windows, or Quick Lock.
Unlock
Enter secret; lock tab closes.
Resume
Continue browsing without tab reload.
Clear promises
“Unlock does not reload my tabs. That was the main reason I installed it.”
“No accounts, no cloud. I can read the MIT source and run npm test myself.”
“Optional TOTP and a recovery code at setup. Straightforward options page.”