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LeechBlock NG

Free browser extension that blocks time-wasting sites on a schedule

FreeFocusChecked Oct 6, 2026
Visit proginosko.com

What is LeechBlock NG?

LeechBlock NG is a free browser extension that blocks chosen websites at the times you set. Sites are grouped into up to 30 block sets, each with its own days and either fixed time periods, a time limit or a combination of the two. It runs in Firefox, Chrome, Edge and other Chromium-based browsers, and is developed as a hobby project by James N. Anderson, who publishes the source code on GitHub.

LeechBlock NG is free to use. See every plan

Good for

  • People who want a free site blocker inside the browser they already use
  • Rationing a site by time allowance rather than blocking it outright
  • Users who want fine control with wildcards, keywords and regular expressions

Worth knowing

  • It blocks only inside the browser where it is installed; other browsers and desktop apps are unaffected.
  • The developer says it is not designed for parental control or for blocking offensive content.
  • There is no macOS or iOS version; the site points to ivBlock, a separate product based on LeechBlock.
  • The browser may still connect briefly to a blocked site, so the developer suggests a HOSTS-level blocker when no connection at all is wanted.

Key features

Block sets
Up to 30 sets of sites, each with its own list, days and times. Lists accept wildcards, exceptions and keywords that match words in a page's title or text.
Time periods and time limits
Block within fixed periods such as 9am to 5pm, after a time limit such as 10 minutes in every hour, or with both combined. Unused time can roll over to the next period.
Lockdown
Blocks the sites in chosen block sets immediately for a duration you specify, outside their normal schedule.
Delaying and password pages
Instead of a plain block, a page can show a countdown before letting you through or ask for a password. A custom blocking page can also be set by URL.
Access control
A password or a random access code can guard the options page, to slow down any attempt to change settings in a weak moment.
Temporary override
An optional override lifts blocks for a set number of minutes, with a cap on how many overrides are allowed in an hour, day or week.

LeechBlock NG pricing

Starts at
Free
Free plan
Entirely free: the site calls it a simple free productivity tool and lists no paid version. The source code is on GitHub under the MPL-2.0 license.
Free trial
None listed
LeechBlock NG$0The complete extension: up to 30 block sets, time periods and time limits, lockdown, delaying and password pages, and access controls.

Read from proginosko.com on Oct 6, 2026. Prices change, so confirm with LeechBlock NG before you buy.

Pricing in detail

LeechBlock NG alternatives

All LeechBlock NG alternatives comparedAll focus apps

Common questions

Is LeechBlock NG free?

Yes. LeechBlock NG is free to use. Entirely free: the site calls it a simple free productivity tool and lists no paid version. The source code is on GitHub under the MPL-2.0 license.

How much does LeechBlock NG cost?

LeechBlock NG lists one plan. LeechBlock NG: $0. Prices were read from proginosko.com on Oct 6, 2026.

Does LeechBlock NG have an Android app?

No Android app was listed when its pages were read on Oct 6, 2026. LeechBlock NG is listed for no platform we could confirm.

Does LeechBlock NG have an iPhone app?

No iPhone app was listed when its pages were read on Oct 6, 2026. LeechBlock NG is listed for no platform we could confirm.

Is LeechBlock NG open source?

Yes. LeechBlock NG is open source, according to its own site.

Who makes LeechBlock NG?

LeechBlock NG is made by James N. Anderson. It dates from 2017.

What are the alternatives to LeechBlock NG?

The closest alternatives to LeechBlock NG in our directory are StayFocusd, BlockSite, Cold Turkey Blocker, SelfControl and Freedom. Each one has a side-by-side comparison with LeechBlock NG.

Sources for this page

The prices, plans, platforms and features above were read from these pages on Oct 6, 2026.