LuabifyQuick device diagnostics

Refresh Rate Test: Check Monitor Hz Online & See If You Are Stuck at 60Hz

Click Refresh rate test Use this browser-based monitor Hz checker to estimate observed refresh rate, compare 60Hz, 120Hz, 144Hz, 165Hz, and 240Hz behavior, and understand why a screen may still feel capped at 60Hz.

Monitor Hz checker

Browser refresh rate checker

Let the reading settle for a few seconds, then compare the estimated Hz with common refresh rates like 60Hz, 120Hz, 144Hz, 165Hz, and 240Hz.

Estimated rate

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Likely standard

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Average frame time

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Stability

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Samples

0 frames

Keep this tab visible for a cleaner reading. Full screen can help reduce noise.

  • Let the test run for a few seconds before judging the rate.
  • Avoid switching tabs or dragging the window between displays mid-test.
  • Compare full-screen and windowed results if the reading looks unstable.

Live frame chart

Recent browser frame timing bars

Estimated refresh rate-

These bars visualize recent browser frame timing. The reading comes from requestAnimationFrame intervals, not direct monitor hardware access.

Why run this refresh rate test online

This refresh rate test is built for the questions people actually have: is my monitor really running at 144Hz or 240Hz, why does my laptop or external display feel stuck at 60Hz, and did a cable, dock, adapter, battery mode, or browser setting limit the result. It is useful for gaming monitors, office displays, ultrawides, touch laptops, and high-refresh phones or tablets because it gives you a quick browser-level read without installing software.

What this tool measures

The tester samples recent frame timing with requestAnimationFrame and turns those samples into an estimated refresh rate, a likely standard rate, average frame time, and a stability score. That makes it useful for spotting whether the browser is presenting near 60Hz, 120Hz, 144Hz, 165Hz, 240Hz, or another common cadence. The chart is only a visual summary; the actual reading comes from browser-observed frame intervals.

Why a 144Hz or 240Hz display can still read near 60Hz

A lower-than-expected result usually points to settings or signal path issues before it points to a faulty panel. Common causes include the operating system staying at 60Hz, a dock or adapter that caps the signal, an older HDMI cable, battery saver reducing presentation cadence, variable refresh behavior, or the page losing focus. External monitors connected through USB-C hubs or budget adapters are especially common sources of a hidden 60Hz cap.

  • A reading near 60Hz often means the browser is currently limited to the standard desktop cadence.
  • A reading near 120Hz, 144Hz, 165Hz, or 240Hz suggests your higher refresh mode is active in the browser.
  • Large swings usually mean tab switching, background load, browser throttling, adaptive refresh, or unstable power and display conditions.
  • Testing in full screen with the page focused usually gives a cleaner sample.
  • A browser-level result is excellent for diagnosis, but it is still not the same as reading exact monitor firmware or GPU output metadata.

What this result can and cannot confirm

This page is strong for practical troubleshooting: checking whether a high-refresh mode is reaching the browser, comparing the same device across battery and charging modes, and checking whether a cable, dock, browser, or output path is holding you back. It does not directly read monitor firmware, verify cable bandwidth, prove panel specs by itself, or expose the full state of variable refresh technologies. It also does not store personal data.

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Frequently Asked Questions

What is my refresh rate right now?

This page estimates the refresh rate your browser is currently observing from recent frame timing. If the reading settles near 60Hz, 120Hz, 144Hz, 165Hz, or 240Hz, your browser is likely presenting close to that cadence.

How do I check if my monitor is really running at 144Hz or 240Hz?

Open the page, keep it visible for a few seconds, and let the reading settle while the tab stays focused. If the estimate stabilizes near your target value, your browser is likely seeing that higher refresh mode.

Why does my high-refresh monitor still look like 60Hz here?

The most common causes are system display settings, cable or dock limits, battery saving, browser throttling, or the page losing focus. A 144Hz or 240Hz monitor does not guarantee that every app is currently presenting at that rate.

Can this help if my monitor became stuck at 60Hz after changing a cable, dock, or adapter?

Yes. This is one of the most useful scenarios for the tool. Test before and after changing the connection path, then compare the observed cadence to see whether a cable, dock, or adapter is limiting your setup.

Does HDMI versus DisplayPort matter for refresh rate results?

Yes, very often. Higher refresh modes commonly depend on DisplayPort or HDMI 2.0 or 2.1, and some adapters or hubs silently cap the signal at 60Hz even when the monitor itself supports more.

Why can a laptop show lower refresh rate on battery or through a hub?

Some laptops reduce presentation cadence to save power, especially on battery. USB-C hubs, docks, and budget adapters can also limit external displays, so a browser result near 60Hz often points to the current output path rather than a bad panel.

What is the difference between estimated refresh rate and likely standard rate?

Estimated refresh rate is the direct browser-level calculation from recent frame timing. Likely standard rate rounds that behavior toward a familiar value like 60Hz, 120Hz, 144Hz, or 240Hz when the estimate is close enough.

Does browser focus or full screen affect the reading?

Yes. Browsers often throttle animation timing when a tab is hidden or not active. Keeping the page focused and using full screen usually produces a steadier sample.

Can this test work on phones, tablets, and gaming laptops?

Yes. It works in modern browsers on desktops and many mobile devices, so it can help check 90Hz, 120Hz, and higher-refresh screens. Mobile and laptop results can still vary with battery mode, browser UI, and adaptive refresh behavior.

Can variable refresh rate affect the result?

Yes. Variable refresh technologies can change frame pacing depending on workload, so the observed cadence may look less fixed and the stability reading may move around more.

Is this the same as reading my monitor hardware directly?

No. This is a browser-based estimate of observed frame cadence. It is excellent for practical troubleshooting, but exact hardware confirmation still belongs to operating system settings, the GPU control panel, or the monitor OSD.

What can this refresh rate test not measure?

It cannot read monitor firmware, verify cable bandwidth directly, prove panel specifications by itself, or expose the full metadata of variable refresh systems. It only measures the frame timing that reaches the browser.