Short answer: On the Chrome and Google pages we checked, Chrome on Android has no setting that blocks adult sites for your own account. What does work is layering free tools around it: Google SafeSearch for search results, a family-filter Private DNS hostname for the whole phone, and, for a child's account, the Chrome filter in Google Family Link. Each one has limits, and on your own phone each can be switched off by you, which is the weak point. This guide covers what each layer does, what it misses and how to add a lock.
Version note: Steps were checked against Google's help pages on 12 Oct 2026. Chrome and Android menus change between versions, so if a label differs on your phone, use the search box in Settings. Where we could not confirm an exact path on an official page, we say so and leave it out.
Chrome's Site settings on Android (More, then Settings, then Site settings) control what sites may do, such as use your location or send notifications. Google's page for it describes choosing Never allow for a permission. That is a permission control, not a way to block a website, and Google's page does not describe a block list for adult content.
So the blocking has to come from somewhere else. Here are the free options, strongest first.
Private DNS sends your phone's website lookups through a provider that refuses to resolve adult domains. It is a system setting, so it applies to browsers and apps that use the phone's DNS, on Wi-Fi and mobile data. It is available on Android 9 and later.
family.cloudflare-dns.com (Cloudflare's setting for blocking malware and adult content) and family-filter-dns.cleanbrowsing.org (CleanBrowsing's Family Filter).On a Samsung Galaxy the path is Settings > Connections > More connection settings > Private DNS, per Samsung's support page.
Limits: Chrome has its own Use secure DNS setting (More, then Settings > Privacy and security, then Use secure DNS). CleanBrowsing warns that browsers with their own encrypted-DNS setting can bypass the phone-level setting, so open that Chrome setting and check it is not pointing at a provider that does no filtering. Google also says Chrome's secure DNS cannot be used on managed or parental-controlled devices. Some school, work or public networks block encrypted DNS, and "Couldn't connect" can also just mean a typo.
SafeSearch filters explicit results in Google Search. On Google's SafeSearch page you can choose Filter, Blur or Off. Google says it affects Google Search only, not other search engines or other websites, so typing an address directly into Chrome still goes through. We could not confirm an exact phone menu path on Google's page, so see our guide on turning SafeSearch on: https://mamoriblocker.com/guides/how-to-turn-on-safesearch/
If the phone belongs to a child whose account a parent manages, Google Family Link has a Chrome filter. In the Family Link app, select your child, tap Controls, then Google Chrome and Web, and choose one of:
Under Manage sites you can add approved or blocked sites by hand. Google states that no filter is perfect. The child has to be signed in to Chrome with the Family Link account for it to apply, and Google notes that other browsers may sidestep these settings. Incognito is turned off while a child is signed in to Chrome with a Family Link account. For the full setup see our guide to a child's Android phone: https://mamoriblocker.com/guides/block-adult-content-kids-android-phone/
This filter is made for a parent managing a child. It is not a setting an adult can use on their own account.
Play content restrictions limit what you can download or watch from the Play Store. Google's page says restricted content can still appear in search results or through direct links, so this does not filter websites in Chrome. It can still help with apps. See our Android guide: https://mamoriblocker.com/guides/block-porn-android-samsung/
Even a perfect Chrome setup covers one app. Other browsers installed on the phone, apps with built-in web views and search inside apps all sit outside it. Google's own Family Link page says other browsers may escape Chrome settings. If you want to block adult sites for yourself, a phone-wide layer and a delay on the off switch matter more than any one Chrome option.
Can I block adult sites in Chrome on Android without an app?
Partly. A family-filter Private DNS hostname and SafeSearch cost nothing and remove a lot. Both can be undone by you in a few taps.
Is there a Chrome setting to block specific websites?
On the Google pages we read, not for your own account. Family Link has a Manage sites list for a child's account.
Does Incognito get around these?
SafeSearch does not cover other sites, and we did not find an official page on how Incognito interacts with Private DNS, so test it. Family Link turns Incognito off for a signed-in child account.
Will blocking in Chrome stop other browsers?
No. That is why a phone-wide layer helps.
Everything above works without any app. Mamori is one more layer, built for adults who want to block adult sites on their own phone, with the lock as the main feature.
Honest limits: Android allows only one VPN at a time, so another VPN or blocker that takes the slot can switch Mamori's filter off. No blocker replaces support from people you trust. For a child's phone, use Family Link as the base layer, since Mamori is built for adults blocking for themselves.
There is a 7-day free trial on the monthly and annual plans, plus a one-time lifetime option. No account, no tracking.
Last checked 12 Oct 2026. This guide is general information, not medical advice.