Why a Chromebook needs an extension for this
On Windows or a Mac you can install a .cur file and change the system cursor. ChromeOS has no such setting: Accessibility lets you pick a cursor colour and make it larger, and that is all. Since a Chromebook is mostly the Chrome browser, the practical answer is to change the cursor inside Chrome - and that is what a cursor extension does.
Cursor Style shows the cursor and the hand pointer you chose on every page you open - Google Classroom, Docs, YouTube, Roblox in the browser - without touching the system. Nothing is downloaded to the Chromebook, no developer mode or administrator rights are needed, and the default cursor comes back the moment you turn the extension off.
Made for ChromeOS
The extension is the only way to get a custom cursor on a Chromebook; it works on every model, old or new.
School Chromebooks
Works whenever the administrator allows Chrome Web Store extensions. No files, so nothing is blocked by itself.
No admin rights
Adding an extension from the Web Store is a normal user action - no developer mode, no settings changes.
Bigger cursor if you need it
The extension's size slider makes any cursor larger - useful on a small Chromebook screen or a classroom projector.
How to change the cursor on a Chromebook
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Open the Chrome Web Store, find Cursor Style and press Add to Chrome. Free, one click.
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Come back here and pick a cursor - from this page, a collection, or by searching a character's name.
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Press Apply. The cursor changes on every page. The extension icon lets you change the size or add a trail effect.
On a school-managed Chromebook
Whether a managed Chromebook can add extensions is decided by the school administrator, not by any website. If the Chrome Web Store opens and shows an Add to Chrome button, Cursor Style will work. If the store is blocked or the button is greyed out, extensions are switched off for your account, and no cursor site can change that - the browser simply will not allow it.
Cursor Style needs no downloads and no special permissions, which is why it is usually on the allowed side: it is the same kind of extension as the school-approved ones, from the same store, reviewed by Google.
Touchscreen and tablet mode
On a Chromebook with a touchscreen the custom cursor shows whenever you use the touchpad or a mouse. In tablet mode, where there is no pointer at all, nothing is shown - and it comes back as soon as you fold the Chromebook open again.