uBlacklist
An open-source extension that hides the sites you choose from your search results.
Why it's a strong pick
uBlacklist cleans up search results, which no site blocker does. It is open source under the MIT license, and it uses Manifest V3. It is actively maintained: version 10.1.1 came out on 19 September 2026, and version 10.1.0 added OneDrive sync.
What it does
uBlacklist hides the websites you pick from search results. Add a site to your blocklist, and it stops showing up on the results page. It does not stop you opening the site directly. It works on many search engines, listed below.
Key features
- Many search engines. Google, Bing, Brave, DuckDuckGo, Ecosia, Kagi, SearXNG, Startpage, Yahoo! JAPAN and Yandex. Support varies by engine and by result type, such as web, images, videos and news.
- Public rulesets. Use lists that others share at ublacklist.github.io/rulesets.
- Sync. Keep your blocklist in step through Google Drive, Dropbox, OneDrive, WebDAV or browser sync.
- Your own list. Add the sites you are tired of seeing.
Who it's for
uBlacklist suits researchers and everyday searchers who are tired of content farms, scraper sites and AI spam showing up in results. It is a search tool, so it does not replace a blocker that keeps you off a site. For that, see LeechBlock NG.
Is uBlacklist safe, and what permissions does it ask for?
uBlacklist is open source under MIT, so its code can be read. Its manifest asks for these permissions: activeTab, alarms, declarativeNetRequestWithHostAccess, identity, scripting, storage and unlimitedStorage. Access to all sites is optional. The README has no privacy section, and we could not read the developer's privacy policy; read it before installing. Check the install prompt too.
Does uBlacklist block sites, or only hide them from search?
It only hides them from search results. If you type the address or click a link on another page, the site still opens. To keep yourself off a site, use a site blocker such as LeechBlock NG. Many people use both.
Which search engines does it support?
The README lists Google, Bing, Brave, DuckDuckGo, Ecosia, Kagi, SearXNG, Startpage, Yahoo! JAPAN and Yandex. It says support varies. Some engines are covered for web, images, videos and news, and others for fewer of these. Check the README before you rely on a particular engine.
FAQ
Can I share a blocklist? The project hosts public rulesets that anyone can use.
What if a search page looks wrong after an update? Search engines change their layout, and support can lag. See the note below.
Good to know
uBlacklist needs permission to run on each search engine you use. When an engine changes its layout, support for it can lag, so a site may briefly show up again. Start with a short list of the worst offenders, then add more as you notice them.
Other distraction blockers to compare
uBlacklist is one of 5 picks in our website and distraction blockers guide, which compares them side by side and explains how to choose. It is the search-side pick. The other picks:
- LeechBlock NG: Blocks the sites you choose, on a schedule or after a time limit.
- RYS: Remove YouTube Suggestions: Hides YouTube suggestions, Shorts and comments.
- News Feed Eradicator: Replaces social media feeds with a quote.
- Fokuser: A simple focus timer that blocks the sites you list while it runs, with data kept on your device. Open source. A very new, small project.
This is a third-party extension, not built or maintained by Xplorekit. We link to the official Chrome Web Store listing — install and permissions are entirely between you and the extension's own publisher.