# LeechBlock NG

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

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.

- **Category:** Focus Apps
- **Made by:** James N. Anderson (since 2017)
- **Website:** https://www.proginosko.com/leechblock/
- **Runs on:** Browser extension
- **Facts last checked:** Oct 6, 2026

## Pricing

LeechBlock NG is free to use.

- **Pricing model:** 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.

| Plan | Price | What you get |
| --- | --- | --- |
| LeechBlock NG | $0 | The complete extension: up to 30 block sets, time periods and time limits, lockdown, delaying and password pages, and access controls. |

Read from https://www.proginosko.com/leechblock/ on Oct 6, 2026. Prices change, so confirm with LeechBlock NG before buying.

## 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.

## 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.

**Tags:** Site & app blocker, Open source

## Alternatives

- [StayFocusd](https://toolgpa.com/tools/stayfocusd): Free Chrome and Edge extension that limits time on distracting sites. [Compare](https://toolgpa.com/compare/leechblock-ng-vs-stayfocusd)
- [BlockSite](https://toolgpa.com/tools/blocksite): Website and app blocker for browsers and phones. [Compare](https://toolgpa.com/compare/blocksite-vs-leechblock-ng)
- [Cold Turkey Blocker](https://toolgpa.com/tools/cold-turkey): Website and app blocker for Windows and Mac with strict locks. [Compare](https://toolgpa.com/compare/cold-turkey-vs-leechblock-ng)
- [SelfControl](https://toolgpa.com/tools/selfcontrol): Free Mac app that blocks distracting sites until a timer ends. [Compare](https://toolgpa.com/compare/leechblock-ng-vs-selfcontrol)
- [Freedom](https://toolgpa.com/tools/freedom): Website and app blocker that runs across computers and phones. [Compare](https://toolgpa.com/compare/freedom-vs-leechblock-ng)

## Sources

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

- https://www.proginosko.com/leechblock/
- https://www.proginosko.com/leechblock/install/
- https://www.proginosko.com/leechblock/documentation/
- https://www.proginosko.com/leechblock/faq/
- https://www.proginosko.com/leechblock/faq/for-sale/
- https://www.proginosko.com/leechblock/faq/macos-ios/
- https://www.proginosko.com/leechblock/faq/privacy/
- https://www.proginosko.com/leechblock/faq/source-code/
- https://www.proginosko.com/leechblock/faq/keywords/
- https://www.proginosko.com/leechblock/version-history/
- https://github.com/proginosko/LeechBlockNG

Page: https://toolgpa.com/tools/leechblock-ng
Listed by ToolGPA (toolgpa.com).