3Eyes / Blog
2026-04-28 · Sienna Richardson

How to Block Roblox on a Chromebook (2026)

Chromebooks are the hardest device to block Roblox on, and it is worth knowing why before you start: there is no hosts file you can edit, no firewall rule you can add, and if the Chromebook came from a school, the account on it is not yours to configure. Most guides written for Windows simply do not apply.

Four methods do work on ChromeOS. They are listed here in order of how well they hold up, not how easy they are.

First: is this a school Chromebook?

Check this before anything else, because it changes which of the methods below are even available to you.

Sign-in screen shows your school's name or logo, or the account is an @yourschool.edu style address? Then the device is enterprise-enrolled, and the school's admin console outranks every parental control you can install. Family Link cannot supervise a managed school account. Extensions you install can be removed by policy, and some cannot be installed at all.

On a school-managed Chromebook, your realistic options are the router (method 4), a conversation with the school's IT department, or a second, personal device for home use. This surprises a lot of parents, and it is the single most common reason a Chromebook block "stops working" - see why Family Link doesn't work on a school Google account for the full picture.

Everything below assumes a personal Chromebook with a family Google account on it.

This is the built-in option and the right starting point for younger children.

Set your child's Google account up as a supervised account through Family Link, then on your phone open the child's profile, go to Controls > Content restrictions > Google Chrome > Manage sites > Blocked, and add the Roblox domains.

Adding roblox.com alone is where most people stop, and it is why the block appears to fail within a day. Roblox loads from several domains, and the ones that matter are:

  • roblox.com
  • rbxcdn.com
  • roblox.qq.com
  • rbx.com

Family Link's blocked-sites list covers subdomains of what you enter, so entering roblox.com also covers www.roblox.com and web.roblox.com. The full picture is in the complete Roblox domain list.

Also block the Roblox Android app under Apps, because Chromebooks run Android apps and a child who cannot reach the site will simply install the app from the Play Store.

Where it fails: Family Link's Chrome restrictions apply to Chrome. A child who installs a different browser from the Play Store - and there are dozens - has a browser Family Link is not filtering. Block app installs, or block the browsers individually.

Method 2: Block the site with a ChromeOS policy extension

A supervised-account setting your child cannot see is harder to work around than one they can. Blocking extensions installed under your own control, with the child account unable to remove extensions, holds better than Family Link's list alone.

The catch is the same one that catches every extension-based control: it only sees traffic inside the browser it is installed in, and it is removable by anyone who can reach the extensions page. Turn off your child's ability to install and remove extensions at the same time, or this method is decorative.

Method 3: Change DNS on the Chromebook

ChromeOS lets you set a custom DNS server per network, under Settings > Network > your WiFi > Network > Name servers > Custom name servers. Point it at a filtering DNS service with Roblox categorised as blocked, and lookups for Roblox domains fail.

This is fast and it covers every browser on the machine rather than just Chrome, which is a real advantage over methods 1 and 2.

Where it fails: the setting is per-network and your child can change it back in about four taps, unless the account is supervised and you have restricted network settings. It also does nothing about the Android app if the app uses its own resolver, and nothing at all once the Chromebook joins a different network - which for a device that goes to school every day is most of the time.

Method 4: Block Roblox at the router

Add the Roblox domains to your router's URL filter or parental controls section. This covers every device in the house, including the Chromebook, without touching the Chromebook itself.

It is the only method on this list that works on a school-managed Chromebook, because it does not require any access to the device or the account.

Where it fails: the moment the Chromebook leaves your WiFi. A phone hotspot defeats it in seconds and so does a friend's house. For a laptop that travels to school daily, router blocking covers a minority of its actual use. The full router walkthrough is here, including the specific menu names for each major brand.

Which method to use

Method Covers every browser Covers the Android app Works off your WiFi Works on a school Chromebook Effort
Family Link No (Chrome only) Yes, if apps blocked Yes No Low
Blocking extension No No Yes Usually no Low
Custom DNS Yes Partly No No Low
Router filter Yes Yes No Yes Medium

There is no single row that is yes all the way across, which is the honest summary of blocking anything on ChromeOS. The practical combination for a personal Chromebook is Family Link for the account and app store, plus DNS for the browsers Family Link does not see. For a school Chromebook it is the router plus a conversation with the school.

Why blocking roblox.com alone stops working

Worth understanding, because it explains most of the "I blocked it and it still works" reports.

Roblox is not one domain. The site is roblox.com, but the game client pulls assets from rbxcdn.com, and blocking only the first leaves the second reachable. More importantly, a child who cannot open roblox.com has three easy next steps: the Android app, a different browser, or now.gg and similar cloud-gaming sites that stream Roblox from a remote machine so nothing Roblox-related is ever requested from your network at all.

The cloud-gaming route is the one that defeats nearly every domain-based block, and it is why blocklists in general struggle here. Each new mirror or streaming site has to be discovered and added before it can be stopped.

Where 3Eyes Fits

Every method above is a blocklist: it stops the things you thought of. The gap is always the thing you did not - a new browser, a cloud-gaming site, a Roblox mirror registered last week.

3Eyes works from the opposite direction. Nothing opens unless you have approved it, so a streaming site nobody has catalogued is already blocked, and so is the second browser, because it is loading a site that is not on the list. It runs on the computer rather than the router, which means it holds at school and on a hotspot, and it needs your password to uninstall. When your child wants a site for homework, they ask from the blocked page and you approve from your phone in a couple of seconds.

For a Chromebook that goes to school, the other thing that matters is what is left when Roblox is gone. 3Eyes ships with educational games and learning activities, and YouTube is restricted to channels you choose rather than blocked outright - which tends to make the whole arrangement much easier to sell to a nine-year-old. See how it works.

Frequently asked questions

Can I block Roblox on a school Chromebook? Not on the device itself - the school's admin policies override anything you install, and Family Link cannot supervise a managed school account. Your options are your home router, which only helps at home, or asking the school's IT department to block it, which they can do in a minute and often will.

Does blocking roblox.com block the Roblox app? No. The Android app on a Chromebook is a separate thing from the website, and it has to be blocked separately - under Apps in Family Link, or by removing Play Store access.

Why does Roblox still work after I blocked it? Almost always one of four reasons: the Android app is still installed, a second browser is being used, the child is on a phone hotspot rather than your WiFi, or they are playing through a cloud-gaming site that streams Roblox without ever loading a Roblox domain.

Can I block Roblox only during school hours? Family Link's schedule applies to the whole device rather than to one site, so the built-in answer is a device downtime window. Per-site scheduling needs a tool that filters by site and time together.

Is there a way to allow Roblox on weekends only? Yes, but not from Roblox or Family Link's site list. This needs either a router with day-of-week rules or software that combines a site list with a schedule. Roblox's own screen time limit is a daily cap, not a weekday/weekend split.