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LeechBlock NG

A free, open-source browser extension that blocks time-wasting sites on schedules or time limits.

Open sourceWebsite and app blockers
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About LeechBlock NG

LeechBlock NG is a browser extension for Firefox, Chrome, Edge and other Chromium browsers such as Brave, Opera and Vivaldi that blocks the sites you waste time on. You set up to 30 groups of sites, each with its own rules: blocked during fixed hours, after a time allowance (say 10 minutes per hour), or a mix of both. Wildcards and exceptions let you block a whole domain but keep one subdomain open, and a lockdown mode blocks sites immediately for a set duration. A password or random access code on the options page adds friction when you're tempted to change the rules. It's free and open source under the Mozilla Public License 2.0, built by one developer. Because it runs inside the browser, it doesn't touch desktop apps or other browsers, and the author notes it isn't meant for parental control.

Best for: People who want free, fine-grained limits on distracting sites inside their browser.

Pros and cons

What works

  • Free and open source
  • Time limits and schedules per group of sites, up to 30 groups
  • Works in Firefox and all major Chromium browsers
  • Wildcards and exceptions for precise blocklists

Why people leave

  • Only blocks inside the browser it's installed in
  • Can't block desktop apps or work across devices
  • Easier to bypass than system-level blockers

Top LeechBlock NG alternatives

See all 3
  1. 1SelfControl logo
    SelfControl

    System-wide Mac blocker that covers every browser and can't be undone until the timer ends.

    66.5
  2. 2Cold Turkey Blocker logo
    Cold Turkey Blocker

    Desktop blocker that also stops apps and offers much stricter locks.

    62.6
  3. 3Freedom logo
    Freedom

    Extends blocks to phones and other computers with synced sessions.

    59.6

Why people left LeechBlock NG

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Reviews

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LeechBlock NG: common questions

Is LeechBlock NG free?

Yes. LeechBlock NG is free, open-source software.

Is LeechBlock NG open source?

Yes. The source code is on GitHub at proginosko/LeechBlockNG.

What platforms does LeechBlock NG run on?

LeechBlock NG is available for Browser extension.

What are the best alternatives to LeechBlock NG?

The highest-ranked LeechBlock NG alternatives right now are SelfControl, Cold Turkey Blocker and Freedom. See the full ranked list for pricing, platforms and verified facts.

See all 3 LeechBlock NG alternatives