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Dev tools · March 16, 2026

Lockin - Productivity Chrome Extension

maintain focus via tab locks, tab limits, and site bans

What it does

What it is - A unique extension which controls browser state to maintain user focus via tab locking, tab limiting, and site banning. 1. Lock a tab in a window, Prevents you from changing tabs in a window. Useful if you need to provide undivided attention to something. 2. Limit total tab count, maybe if you get distracted easily by opening too many tabs and are a bad multitasker. 3. Restrict ability to visit certain sites, Automatically closes tabs that visit restricted URL's.

Does the same job

all alternatives →
  • EnhanceOct 2025 · ▲108

    Turn your new tab into a daily boost of calm + productivity.

  • Tab Protector2022 · ▲73

    Chrome extension to prevent accidental tab closure & cluster

  • Smart Tab Mute2016 · ▲120

    Ensures that only one tab is playing sound at the same time

  • Focus2020 · ▲78

    a Google Chrome extension to keep you focused while working.

  • LockIn for ChromeJul 2026 · lockinmcp.com · ▲30

    Increase productivity with AI distraction blocking

  • Quick 'A'2019 · ▲73

    Quick Access to all browser tabs

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