The fastest way depends on what you're trying to block and who needs the block

You can block a website on your phone in three ways: through your phone's built-in parental controls, through your internet provider's tools, or through a third-party app. Which one works best depends on whether you're blocking sites for yourself, for a child on your account, or across your entire home network.

If you want to block a site on just your phone right now, your operating system's native controls are usually fastest. If you're a parent setting restrictions on a child's device, your phone's parental controls are designed for that. If you want to block sites across every device in your home — including tablets and computers — your internet provider's tools reach everything that connects to your wifi.

Key Takeaways

  • iPhone users can block websites through Screen Time settings without installing anything; Android users need either Google Family Link or a third-party app.
  • Parental controls on both platforms let you restrict access by category (adult content, gambling, violence) or block specific URLs you type in.
  • Your internet provider may offer network-level blocking through your router's admin panel, which blocks sites on all devices connected to that wifi.
  • Third-party apps like OpenDNS or Cloudflare for Families block sites across your entire home network and work on any device.
  • A determined user can often bypass phone-level blocks by switching to mobile data, using a VPN, or changing DNS settings — these are not tamper-proof.

Blocking websites on iPhone through Screen Time

Open Settings, tap Screen Time, then tap Content & Privacy Restrictions. Turn on Content & Privacy Restrictions (you'll set a PIN that only you can change). Tap Allowed Apps and make sure Safari or your browser is turned on — you need the browser enabled to set website restrictions. Go back and tap Content Restrictions, then tap Web Content.

You'll see three options: Unrestricted Access, Limit Adult Websites, or Allowed Websites Only. Limit Adult Websites blocks known adult sites but allows most others. Allowed Websites Only blocks everything except a list you create — this is the strictest option. If you choose either restriction, you can add specific sites to block or allow by scrolling to the bottom and tapping Add a Website under either section.

The PIN you set is what prevents someone from turning off these restrictions. If you forget it, you'll need to erase the phone and set it up again, so write it down somewhere safe.

Blocking websites on Android through Google Family Link

Google Family Link is Google's parental control tool, and it's the native way to block sites on Android. If you're setting this up for a child, you need a Google account for yourself and one for the child (children under 13 can have supervised accounts). Download the Family Link app on your phone, then add the child's device.

Once the child's device is linked, open Family Link on your phone, select the child's account, tap Controls on Google Play, then tap Manage all Google Play content. Scroll down to Web & App Activity and turn it on — this lets you see what sites they visit. Go back to the main Family Link menu, tap App activity, then tap Manage apps & websites. You can block specific apps here, but for websites, you'll need to use Chrome's built-in restrictions instead.

Open Chrome on the child's device, tap the three-dot menu, go to Settings, then tap Parental controls. Turn on Parental controls and set a PIN. You can now block specific websites by URL. Family Link also lets you set daily screen time limits and see app usage, but website blocking happens in Chrome itself, not in Family Link.

Blocking websites at the network level through your router

If you want to block a website on every device in your home — phone, tablet, computer, smart TV — you can do it at your router. Log into your router's admin panel by opening a browser and typing your router's IP address (usually 192.168.1.1 or 192.168.0.1; check your router's label if that doesn't work). You'll need your router's admin password, which is different from your wifi password.

Once you're logged in, look for a section called Parental Controls, Content Filtering, or Access Control. The exact menu name varies by router brand. You should be able to enter website URLs or domain names to block. Some routers let you block by category (adult content, gambling, social media) instead of typing individual sites. Any device on your wifi will be blocked from reaching those sites, regardless of what browser they use.

This method blocks sites for everyone on your network, including guests. If you want to block sites only for certain devices, you'll need a third-party service instead.

Using a third-party DNS service to block across your home

Services like Cloudflare for Families and OpenDNS let you block websites by changing your network's DNS settings. DNS is what translates website names into addresses your phone can reach; by routing your DNS through their service, you can block sites before your phone even tries to connect.

Cloudflare for Families is free and blocks malware and adult content by default. To set it up, go to your router's settings and change the DNS servers to Cloudflare's addresses (1.1.1.2 for IPv4 and 1.1.1.3 for the second server). OpenDNS is more customizable — you can block by category or add specific URLs — but the free version has limits; paid plans start around $40 per year.

The advantage of DNS-level blocking is that it works on every device connected to your network, including phones on wifi. The disadvantage is that a user on mobile data (not wifi) can bypass it by changing their phone's DNS settings, and some VPNs will also bypass it. For a child's device, combining DNS blocking with parental controls on the phone itself makes it much harder to work around.

Why website blocks can be bypassed and what that means

Phone-level blocks (Screen Time on iPhone, Family Link on Android) can be circumvented by switching to mobile data instead of wifi, because the restrictions only apply to the device itself. A user can also install a VPN app, which encrypts their traffic and hides which sites they visit — many VPNs will bypass website blocks entirely.

Router-level and DNS-level blocks are harder to bypass on wifi, but they fail the moment someone switches to mobile data. They also don't work against VPNs. If you're trying to enforce blocks on a child's device, the most effective approach is to combine phone-level restrictions with network-level blocking, disable the ability to install apps (on iPhone through Screen Time, on Android through Family Link), and monitor data usage to notice if they're using mobile data heavily.

None of these methods are tamper-proof. They work best when combined with open conversation about why the blocks are in place, especially with older children and teens.

Blocking a website without installing anything

If you just want to block one site on your phone temporarily and you don't want to install an app, your phone's native tools are your only option. On iPhone, Screen Time is built in. On Android, you have two choices: use Google Family Link (which requires a Google account and setup), or use your browser's built-in features.

Most Android browsers don't have native blocking features, but some third-party browsers like Firefox Focus include tracking and ad blocking. For a quick, temporary block without setup, your best option is to ask your internet provider whether they offer free parental controls through your router — many do, and you can manage them from their website or app without touching your phone.

Frequently Asked Questions

Can I block a website on just my phone without affecting other devices?

Yes. Use Screen Time on iPhone or Google Family Link on Android. Both restrict only that device. Router and DNS-level blocks affect every device on your network, so use those only if you want to block sites for everyone.

What's the difference between blocking by category and blocking by URL?

Blocking by category (adult content, gambling, violence) blocks thousands of sites at once based on what they contain. Blocking by URL blocks only the specific website you type in. Categories are faster to set up but less precise; URL blocking is more work but lets you allow specific sites within a blocked category.

Can someone bypass a block by using a VPN?

Yes. A VPN encrypts traffic and hides which sites are being visited, so it bypasses website blocks at the router or DNS level. Phone-level blocks can also be bypassed by switching to mobile data. Combining multiple methods makes bypassing harder but not impossible.

Do I need to pay for website blocking?

No. iPhone's Screen Time and Android's Google Family Link are free. Your router may have built-in parental controls at no cost. Cloudflare for Families is free. Some services like OpenDNS charge for advanced features, but basic blocking is available for free from multiple sources.

What should I do if I forget my Screen Time PIN on iPhone?

You'll need to erase the phone and set it up again. Apple does not have a way to recover a forgotten Screen Time PIN. Write down any PIN you set in a safe place, or use a PIN you'll remember.