You can filter Google results by excluding words, but the method depends on which Google service you use
Google Search itself does not have a built-in "block keywords" feature in the way some other search engines do. However, you can exclude specific words from your results using the minus sign operator, and you can adjust your search settings to filter out adult content. If you want to stop seeing results about a particular topic across multiple searches, you will need to use your browser's extensions or adjust your Google account settings — neither of which is a native Google feature.
The most direct approach is the search operator, which works immediately but only lasts for that single search. If you want ongoing filtering, you are relying on third-party tools or your browser's capabilities, not Google's own controls.
Key Takeaways
- Use the minus sign operator (for example, coffee -starbucks) to exclude a word from a single Google search result.
- Google's SafeSearch filter can reduce adult content in results, but it does not block specific keywords or topics you choose.
- Browser extensions like uBlacklist or Unwanted can filter out domains or keywords across all your searches, though they are not made by Google.
- Blocking keywords in Gmail or Google News uses different controls than blocking them in Google Search.
- Your search history and personalization settings affect what results you see, but deleting history does not retroactively change past results.
Using the minus operator for a single search
The fastest way to exclude a word from one search is to type a minus sign directly before the word you want to remove. For example, if you search for python -snake, Google will show you results about the programming language and filter out pages about the animal. The minus sign must come immediately before the word with no space between them.
This works for multi-word phrases too. If you want to exclude a phrase, put it in quotation marks after the minus sign: apple -"apple pie" will show results about the company or fruit but hide recipes. You can use multiple minus operators in one search: java -coffee -island will prioritize results about the programming language.
The limitation is that this filter only applies to that one search. The next time you search, you start fresh. If you find yourself using the same exclusion repeatedly, a browser extension is more practical.
SafeSearch and what it actually filters
Google's SafeSearch is a content filter built into Google Search. When you turn it on, Google attempts to remove sexually explicit images, videos, and websites from your results. You can enable it by going to Google Search settings (google.com/preferences), scrolling to the SafeSearch section, and selecting "Turn on SafeSearch."
SafeSearch does not let you block specific keywords or topics of your choice. It only filters for adult content, and it is not perfect — some explicit material still appears, and some legitimate results get filtered out by mistake. It also does not carry over to private browsing or incognito mode unless you are signed into your Google account.
If you want to block particular keywords or topics beyond adult content, SafeSearch alone will not do it. You will need to use the minus operator for individual searches or a browser extension for ongoing filtering.
Using browser extensions to filter keywords across searches
uBlacklist is a free browser extension available for Chrome, Firefox, and Edge that lets you block specific websites or keywords from appearing in your Google Search results. You can add domains one at a time, upload a list, or subscribe to community-maintained blocklists. Once you add a keyword or domain, it will be filtered out of every Google search you do, not just one.
To use uBlacklist, install it from your browser's extension store, open the extension, and click "Add to blacklist." You can type a domain (example.com) or use a wildcard pattern to block multiple pages. For keyword filtering, you enter a pattern like *keyword* to block any page containing that word. The extension then hides those results from your Google Search page.
Unwanted is another option for Chrome and Firefox that blocks websites and keywords. It works similarly to uBlacklist but has a simpler interface if you only need basic blocking. Both extensions are free and do not require a Google account.
The trade-off is that these extensions are not made by Google, so they depend on the extension developer to maintain them. If an extension stops being updated, it may stop working with new versions of your browser. Check the reviews and update date before installing.
Blocking keywords in Gmail and Google News
Gmail and Google News have their own filtering systems separate from Google Search. In Gmail, you can create filters to automatically delete, archive, or label emails containing specific words. Go to Settings, click Filters and Blocked Addresses, and create a new filter. Type the keyword in the "Has the words" field, then choose what to do with matching emails.
In Google News, you can block topics or sources by clicking the three dots next to a story and selecting "Show fewer stories like this" or "Block [publication name]." Over time, Google News learns which topics and sources you want to see less of, but this is preference learning, not keyword blocking. You cannot enter a list of keywords to block in Google News the way you can in Gmail.
How search history and personalization affect what you see
Google personalizes your search results based on your search history, location, and device. If you have searched for a topic many times, Google may show you more results related to that topic in future searches, even if you do not include it in your query. This is different from blocking — it is Google predicting what you want to see.
You can view and delete your search history by going to myactivity.google.com. Deleting your history will stop Google from using past searches to personalize future results, but it does not retroactively change results you have already seen. If you want to prevent Google from storing your searches at all, you can turn off Web & App Activity in your Google Account settings, though this also affects other Google services like Maps and YouTube.
Incognito mode in Chrome (or Private mode in Firefox) does not store your search history on your device, but Google still sees your searches and may use your IP address and other signals to personalize results. Turning off personalization is not the same as blocking keywords.
When blocking keywords does not work the way you expect
The minus operator and browser extensions both have limits. If you search for a very common word and exclude a less common one, you may still see results that mention both. For example, searching bank -river might still show results about riverbank because the word "bank" is the primary topic. Google prioritizes relevance over your exclusion.
Browser extensions can also slow down your browser if you add too many filters, and they only work in the browser where you installed them. If you switch to a different browser or use your phone, the filters do not follow you. Some websites also block or interfere with extensions, so filtering may not work on every site.
SafeSearch can be bypassed by users who know how to turn it off, so it is not a parental control you can enforce on someone else's account without their password. If you need to control what someone else sees, you would need to set up a supervised Google Account, which is a different process.
Frequently Asked Questions
Can I block a keyword on Google so I never see it again?
Not natively through Google. The minus operator works for one search at a time. For ongoing blocking, you need a browser extension like uBlacklist. Google Search itself does not have a feature to permanently block keywords across all your searches.
Does SafeSearch block keywords I choose?
No. SafeSearch only filters adult content. It does not let you block specific words or topics. If you want to block particular keywords, use the minus operator for individual searches or a browser extension for ongoing filtering.
Will blocking keywords in Gmail also block them in Google Search?
No. Gmail filters only affect your email. They do not change what appears in Google Search results. You have to set up filtering separately for each Google service.
Do browser extensions for blocking keywords work on my phone?
Most do not. Browser extensions are typically available only on desktop versions of Chrome, Firefox, and Edge. Mobile browsers have limited extension support. You would need to use the minus operator on your phone for each search.
If I delete my search history, will Google stop showing me results about topics I searched before?
Deleting your history stops Google from using your past searches to personalize future results, but it does not block keywords. Google may still show you results about those topics if they are relevant to your current search. Personalization and keyword blocking are different things.