Free online FPS checker
FPS Checker & FPS Tester Online
Use this FPS checker to run a live FPS tester in your browser. It measures current FPS, average FPS, 1% low FPS, max FPS, frame time, jitter, dropped frames, and a simple stability score with no download or extension.
Real-time FPS checker
Live browser FPS, lows, and stability
Current FPS
Runs continuously until you press Stop Test.
Measurement result
Average
1% Low
Max FPS
Dropped
Frame Time
Jitter
Keep the tab visible while testing. Hidden tabs, battery saver, heavy downloads, and screen recording can lower browser FPS or create frame spikes.
What the checker measures
FPS, low FPS, and frame time tell different parts of the story
A useful FPS checker should show more than one number. Current FPS reacts quickly, average FPS shows the general level, and low FPS helps reveal stutter.
Current FPS
The latest real-time frame rate estimate.
1% Low FPS
A practical signal for dips and stutter.
Frame time
Milliseconds per rendered frame.
When to use it
Use the same FPS checker setup for repeatable comparisons
Check FPS after a settings change
Run the FPS checker before and after changing power mode, browser flags, GPU settings, or display refresh rate.
Find frame pacing problems
Average FPS can look fine while low FPS and frame-time spikes reveal stutter.
Compare devices quickly
Use the same run length and stress level on each device for a repeatable browser-based baseline.
How to run a clean FPS check
Make each run repeatable before comparing results
An online FPS checker is most useful when you keep the test environment consistent. Open the checker in a fresh tab, close heavy background pages, stop screen recording, and leave the tab visible while the chart is collecting samples. If you change the stress level, run another test from the beginning instead of comparing a mixed result.
Browser frame rate is influenced by the device, operating system, graphics driver, power mode, display refresh rate, and browser scheduling. A short one-second spike is less important than the pattern across repeated checks. Look for a stable average, a reasonable 1% low value, and frame time that does not jump wildly between samples.
If you are using the checker for troubleshooting, write down the browser name, device, display refresh rate, stress level, and power mode with each run. Those details make the result easier to reproduce later and help separate a real performance change from normal browser variation.
Average FPS
Average FPS tells you the general rendering level over the current sample window. It is the easiest number to compare after changing power settings, browser flags, external monitors, or GPU options. Treat it as a baseline, not the whole story.
1% low and dropped frames
Low FPS and dropped-frame counts help explain stutter. If the average stays high but 1% low falls sharply, your device is probably producing uneven frame pacing. That can feel worse than a slightly lower but more consistent frame rate.
Frame time
Frame time converts FPS into milliseconds per frame. A 60 FPS result is about 16.67 ms, 120 FPS is about 8.33 ms, and 240 FPS is about 4.17 ms. Lower frame time usually means smoother motion and lower visual latency.
Screen FPS test
You can also use this page as a screen FPS test or test screen FPS checker when you want to verify how smoothly a display and browser present motion. It is useful for quick monitor checks, browser comparisons, and confirming whether a system feels capped below the expected refresh rate.
FPS checker FAQ
Common questions about checking FPS online
Is a browser FPS checker accurate?
It is accurate for the browser rendering loop, which makes it useful for checking display smoothness, browser performance, and repeatable device comparisons. It is not the same as an in-game benchmark because games use their own engine, scene complexity, and GPU workload.
Why does my FPS checker show 60 on a 120Hz screen?
The browser can be capped by power saver, an inactive tab, an external display mode, operating system refresh settings, or browser energy controls. Confirm your display is actually running above 60Hz, then repeat the test with the tab active.
What is a good FPS result?
For general browsing and video, stable 60 FPS is usually smooth. For high-refresh monitors and competitive games, 120 FPS, 144 FPS, or higher can feel more responsive. Stability matters as much as the headline number.
How should I compare two devices?
Use the same browser, the same stress level, the same power mode, and the same run length. Run each device twice and compare average FPS, 1% low FPS, and frame time instead of relying on one quick sample.
Can the stress level change my FPS result?
Yes. A higher stress level draws more particles and creates more browser work, so FPS may drop on slower devices. Keep the stress level the same when comparing devices, browsers, power modes, or graphics settings.
Is this also an FPS tester online?
Yes. People search for this kind of tool as an FPS checker online, FPS tester online, FPS check online, or frame rate checker. The purpose is the same: measure browser frame rate and show whether motion is stable.
Can I leave this FPS checker running?
Yes. The checker keeps running until you stop it, while the chart focuses on the latest 30 seconds so current dips, throttling, and frame-time changes stay easy to read.
What does the stability score mean?
The stability score combines average FPS, 1% low FPS, and frame-time jitter. A high score means the result is not only fast, but also consistent enough to feel smooth during visible motion.