Can Canvas See If You Switch Tabs?

That distinction matters: a focus-loss entry says the quiz page was no longer active. It does not reveal your destination and, according to Instructure, quiz logs are intended to investigate quiz problems—not to prove cheating by themselves.

Canvas LMS does not show instructors the contents or URL of another tab. Instructure's instructor guide documents a teacher-facing Stopped viewing the Canvas quiz-taking page entry when a student navigates away, followed by Resumed when the student returns. The log records the quiz-page event, not the destination.

Want to test it action-by-action? Use the free Canvas Tracking Test to trigger tab-switch, focus, and visibility events in your own browser, or open What Can Canvas See? to check which actions Canvas can actually record.

Action	Can Canvas see it?	What gets logged?
Switch tabs	Yes, as focus loss	Stopped viewing the Canvas quiz-taking page
See tab name or URL	No	Nothing about the destination tab
Browser history	No	Canvas cannot read history, bookmarks, or other tabs
Second monitor or split screen	Only if Canvas loses focus	Same focus-loss quiz log entry

Below: how the mechanism works, what your teacher sees, the differences between Classic and New Quizzes, and why a focus-loss entry needs context. You can also read the official Instructure quiz-log guide.

How Canvas Tab Detection Actually Works

To understand what Canvas can and cannot see, you need to understand the technology behind its tab detection system. Canvas uses standard browser APIs, including the Page Visibility API and browser focus events, to determine whether its page is active or hidden.

Here is how it works at a technical level. When you open a Canvas quiz, the quiz page loads a JavaScript file that listens for two types of browser events:

• visibilitychange - This event fires whenever the browser tab becomes hidden or visible. If you switch to a different tab, minimize the browser, or open a new window on top of the quiz, the browser reports the quiz tab as "hidden."
• blur / focus - These events fire when the browser window itself loses or gains focus. Clicking on any application outside the browser, such as a calculator or notes app, triggers a blur event on the quiz page.

Browser visibility and focus signals help explain why a quiz page can notice that its own state changed. The reliable teacher-facing claim is narrower: supported Canvas quiz logs may show that the quiz-taking page stopped being viewed and later resumed. The documented entry does not include the destination tab, URL, or app.

This is an important distinction. Canvas operates within the security sandbox of your web browser. Web browsers are designed to prevent websites from seeing what other websites you have open. This is a fundamental security feature of the internet, and Canvas cannot bypass it. No website, Canvas included, can enumerate your open tabs or read content from another domain. The browser simply will not allow it.

What Your Teacher Sees in Quiz Logs

When your teacher reviews your quiz attempt, they have access to a feature called the quiz activity log. This log presents a chronological timeline of your quiz session, and it includes entries like:

• Quiz started - the timestamp when you began the attempt
• Stopped viewing the Canvas quiz-taking page — each instance where the tab detection triggered
• Returned to the quiz page - when you came back to the quiz tab
• Answered question X - when you selected or changed an answer
• Quiz submitted - the timestamp of your final submission

What stands out immediately are the "Stopped viewing the Canvas quiz-taking page" entries. Your teacher may notice a repeated pattern, but the entry does not reveal whether you opened Google, checked a notification, changed applications, or encountered a browser problem. Instructure explicitly warns that quiz logs should not be used alone to validate academic integrity.

Teachers can also calculate how long you were away each time by looking at the gap between the "left" and "returned" timestamps. A student who leaves for 45 seconds, comes back, answers a question, then leaves again for another minute is exhibiting behavior that looks very different from someone who accidentally clicked their bookmarks bar once.

The quiz activity log is available to instructors for both Classic Quizzes and New Quizzes, although the interface and level of detail differ slightly between the two, which we will cover in a later section.

Can Canvas See Your Browser History?

No. Canvas absolutely cannot see your browser history. Your browsing history is stored locally on your device and is protected by your browser's security model. No website can access another website's data, your bookmarks, your saved passwords, your downloads, or your browsing history. This applies to Canvas just as it applies to every other website on the internet.

There is a common misconception that because Canvas is provided by your school, it might have elevated permissions or special access to your computer. This is not the case. Canvas is a web application that runs inside your browser tab, and it is bound by the same security restrictions as any other website. Your school's IT department cannot grant Canvas the ability to read your browser history through the LMS itself.

The only scenario where your browsing activity could be monitored is if your school has installed dedicated monitoring software on a school-owned device, such as GoGuardian, Securly, or Lightspeed. These are separate applications that run at the operating system level, not through Canvas. If you are using your own personal device, these tools are not present, and your browsing history remains completely private from Canvas and your institution.

Does Canvas Know Which Website You Visit?

No. When Canvas logs a "Stopped viewing the Canvas quiz-taking page" event, it contains zero information about where you went. Canvas does not know whether you switched to Google, opened a PDF, checked your email, or simply minimized the browser to look at your desktop wallpaper. All Canvas knows is that the quiz tab lost focus.

This is a direct consequence of how web browsers work. The browser's security architecture, known as the same-origin policy, prevents any website from accessing information about other open tabs or windows. Canvas runs on your school's Canvas domain (for example, myschool.instructure.com), and it has absolutely no ability to read data from google.com, quizlet.com, or any other domain. The browser enforces this boundary at a fundamental level.

So while an instructor may see that the quiz-taking page stopped being viewed, the entry does not show where you went. Instructure says quiz logs are not intended to validate academic integrity or identify cheating, so any departure needs context.

Tab Detection in Classic Quizzes vs New Quizzes

Canvas currently offers two quiz engines: Classic Quizzes and New Quizzes. Both support tab detection, but there are differences in how they implement and display it.

Classic Quizzes can provide instructors a timestamped quiz activity log when the feature is available. Instructure documents page-departure and resumed entries, while cautioning that the log is not intended to validate academic integrity.

New Quizzes (powered by Instructure's newer assessment engine) also track page departure events, but the reporting interface is different. New Quizzes display activity data within the SpeedGrader view, and the log format may present events in a slightly different layout. However, the core behavior is the same: leaving the quiz page generates a logged event that your instructor can review.

Instructure has continued updating New Quizzes activity logging. Whether a particular departure appears depends on the quiz engine, enabled features, browser behavior, and session conditions, so students and instructors should avoid treating the log as a perfect recording.

Regardless of which quiz type your instructor uses, the same principle applies: Canvas detects the departure event but does not capture any information about where you navigated. The log entry is functionally the same in both systems.

How to Prevent Canvas Tab Detection

If you want to avoid "Stopped viewing the Canvas quiz-taking page" entries appearing in your quiz activity log, there are a few approaches students commonly consider, but most of them do not actually work.

Using incognito mode does not change the focus signals. Whether you take the quiz in a regular or incognito window, the browser can still report that the quiz page lost focus, and supported Canvas quiz flows may log that departure.

A second device is a separate policy question. Canvas LMS does not provide instructors a standard report of nearby devices, but proctoring and school-managed-device software can have broader visibility. More importantly, students should follow the assessment rules for allowed references and devices.

Browser privacy tools operate at a different layer. Canvas Ninja's Privacy Guard is designed to reduce supported quiz focus-event reporting in normal Chrome sessions. It is not a lockdown-browser or third-party proctoring bypass, and behavior can vary as Canvas changes.

The Canvas Ninja extension page explains its current permissions, supported features, and limits. Review those details before relying on any browser extension during coursework.

Separate proctoring tools such as Respondus, Honorlock, or Proctorio can add screen recording, lockdown controls, or other monitoring. The Canvas-only answer on this page does not apply when one of those tools is required.

Frequently Asked Questions

Can Canvas see what tabs I have open?

No. Canvas cannot see which specific tabs you have open or what websites you are visiting. It can only detect when the quiz tab loses focus, meaning you navigated away from the quiz page. The browser's security model prevents any website, including Canvas, from reading information about your other open tabs.

Can Canvas see if you switch tabs?

Canvas can record that the quiz page lost focus, often as a "Stopped viewing the Canvas quiz-taking page" event. It cannot see the destination tab, URL, or app, and the log is not a perfect or conclusive record of why focus changed.

Can Canvas see my screen during a quiz?

No. Canvas LMS by itself has no screen-viewing or screen-recording capability. It cannot take screenshots, access your webcam, or monitor your desktop. Only third-party proctoring software, such as Respondus LockDown Browser, Honorlock, or Proctorio, can monitor your screen and camera. If your quiz does not require a proctoring tool, Canvas cannot see your screen at all.

Does using a second monitor trigger Canvas tab detection?

Simply moving your mouse to a second monitor does not change browser focus. Clicking another window can shift focus away from the Canvas quiz tab, which may produce a "Stopped viewing the Canvas quiz-taking page" event in a supported quiz flow. The key factor is focus, not mouse position.

Can Canvas detect if ChatGPT is open?

Canvas LMS alone cannot see that ChatGPT is open in another tab, window, or app. During supported quiz flows, Canvas may record that the quiz page lost focus if you click away, but it cannot identify ChatGPT as the destination. Separate proctoring or managed-device software may have broader visibility.

Can Canvas see when I click out of my screen?

During a supported Canvas quiz, clicking another window or app can make the quiz page lose focus and may create a page-departure event. Canvas cannot see what you clicked or what happened outside its page.

Can Canvas tell if you have two windows open?

Canvas LMS alone cannot count or identify your open browser windows. If you interact with another window during a supported quiz, Canvas may record that its quiz page lost focus, but it cannot see the other window. Separate proctoring software may behave differently.

Conclusion

Canvas cannot see what tabs you have open, which websites you visit, or what is on your screen. During supported quiz flows, it can record that the quiz page stopped being active. Teachers see a timestamped event—not the destination and not proof of what happened away from the page.

The technical limitation is clear: Canvas operates within the browser sandbox and cannot read your browsing history, enumerate your open tabs, or capture operating-system screenshots. A focus event can show that its page stopped being active, but not what happened elsewhere.

For a hands-on explanation, use the Canvas Tracking Test and compare the results with the official Instructure guidance. If a quiz uses separate proctoring software, follow the permissions and rules shown before the assessment starts.

Understanding how Canvas tracking works puts you in control. Now that you know exactly what Canvas can and cannot see, you can make informed decisions about how you approach your quizzes and exams.