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Can Canvas See?
Can Canvas see your other tabs?
This one trips everyone up. Canvas can tell you left the quiz — but never where you went. The gap between those two facts is the most misunderstood thing about Canvas detection.
NoThe short answer
Can Canvas see your other tabs?
No. Canvas can detect that you left the quiz tab, but it can never see which tab you switched to or what's on it. Browsers keep tabs sandboxed from one another — a quiz page simply cannot read another tab. It knows you left; it has no idea where you went.
| Signal | Canvas | What that means |
|---|---|---|
| That you left the quiz tabLogged as a “stopped viewing the quiz” event on quizzes. | Can see | Logged as a “stopped viewing the quiz” event on quizzes. |
| Which tab you openedBrowsers sandbox tabs — Canvas can't read another tab's URL or content. | Can't see | Browsers sandbox tabs — Canvas can't read another tab's URL or content. |
| What's on your other tabsA page can never read the contents of a different tab. | Can't see | A page can never read the contents of a different tab. |
| Your browser historyCanvas has no access to your history or bookmarks. | Can't see | Canvas has no access to your history or bookmarks. |
| Tabs in a different windowSame rule — only the quiz page's own focus state is visible. | Can't see | Same rule — only the quiz page's own focus state is visible. |
What Canvas detects: that you left, not where
When you switch tabs during a quiz, Canvas records a “stopped viewing the quiz” event. That's the entire signal — a note that the quiz page is no longer in front. It carries no information about the tab you opened, its address, or its contents.
Why browsers make this impossible
It's not a Canvas limitation — it's a browser one. Tabs are sandboxed: a web page can never read the URL or content of a different tab. If Canvas could see your other tabs, so could every other site you visit, which would be a catastrophic privacy hole. The same rule that protects your banking tab protects this one.
The catch: leaving is still logged
Don't mistake “can't see where” for “can't tell.” The act of leaving is recorded even though the destination isn't, and a run of tab-switches on a timed quiz is exactly the pattern instructors look for. The way to stay clean is to not leave at all — which is what CheatGPT is built to do.
Frequently asked questions
Can Canvas see your other tabs?
No. Canvas can detect that the quiz tab lost focus — that you left — but it can't see which tab you went to or what's on it. Browsers isolate tabs from each other for security.
Can Canvas see what website I opened?
No. The destination is invisible to Canvas. It only knows the quiz page stopped being the active tab; the URL and contents of any other tab are off-limits to it.
So what can Canvas actually tell?
That you left and roughly for how long. On a quiz, that's logged as a “stopped viewing” event with a timestamp — but with no information about where you went.
Is switching tabs still risky then?
Yes — because the act of leaving is logged even though the destination isn't. A pattern of tab-switches on a timed quiz is the flag, regardless of where you went.
How does CheatGPT avoid this entirely?
It answers questions on the quiz page, so you never open another tab. Nothing to detect, nothing to log.
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