Output
Animation FPS; frame intervals, milliseconds
UserBenchmark / All Tools / Refresh Rate Test
Display
Refresh Rate Test
Estimate visible browser refresh cadence with frame timestamps.
Free to useNo downloadNo sign-up
Refresh Rate Test · At a glance
Quick answer: Estimate visible browser refresh cadence with frame timestamps. A median interval of about 16.67 ms corresponds to 60 frames per second; about 6.94 ms corresponds to 144.
Refresh Rate Test
The test loads when you open it. Device access is requested only after you choose to start.
Detailed guide
How to use this tool
- Start the animation and leave the tab visible.
- Collect several seconds of frame timestamps before comparing another display mode.
Input
Visible tab and animated workload
Browser requirement
requestAnimationFrame timestamps
Processing
Runs on your device; no tool-result upload
How it works and what the result means
Frame cadence is estimated from requestAnimationFrame timestamps. Browser FPS may be capped by refresh rate, power settings or background throttling. It is not a native-game FPS prediction.
Reading the result
A median interval of about 16.67 ms corresponds to 60 frames per second; about 6.94 ms corresponds to 144. This is animation cadence rather than a panel specification.
Frame cadence versus panel capability
A median interval near 16.67 ms suggests 60 Hz animation cadence; about 6.94 ms suggests 144 Hz. A browser can schedule below the display’s maximum. Multiple monitors, battery saving and background tabs can affect it. Check OS display settings if the measured cadence is lower than expected.
What to check next
Check OS refresh settings, battery saving and background load. A browser may schedule below the maximum refresh rate.
A frame sequence may reveal gaps in a camera photo, but software timing alone cannot prove a monitor is displaying or skipping physical frames.
Frequently asked questions
Why is the estimate lower than my monitor rating?
The selected operating-system mode, power policy or browser rendering path may limit cadence. The test cannot force the monitor to use its advertised maximum.
How do I start the Refresh Rate Test?
Start the test and keep the tab visible. For FPS, adjust workload. For frame skipping, photograph the moving frame sequence with a long exposure.
Why does the reading change in a background tab?
Browsers commonly reduce animation activity in hidden tabs to save resources. Keep the test visible and compare foreground runs under the same power settings. A background reading is not a useful monitor capability check.
Is animation FPS the same as panel refresh rate?
They are related but separate. Animation callbacks describe the browser scheduling path, while the physical display updates through the operating-system and graphics pipeline. Software timestamps alone cannot observe emitted frames.
What should I check before comparing two monitors?
Choose the intended refresh mode in system settings, keep power mode and browser constant, and repeat several foreground runs. Mixed-refresh multi-monitor setups and heavy background rendering can change animation cadence.
Does this tool require a download or an account?
No. Open the interactive tool above in a modern browser. The instructions and explanations are available even with JavaScript disabled; running a test needs JavaScript.