Online frame rate checker
Frame Rate Checker - Live Frame Time Test
Use this frame rate checker to run a live browser frame time test. It measures current FPS, average FPS, max FPS, 1% low FPS, frame time, jitter, spike count, and stability for users who need to understand why motion feels smooth, capped, or uneven.
Frame timing diagnostics
Live frame rate, frame time, and jitter check
Current FPS
Average frame time
Measurement result
Average FPS
1% Low FPS
Max FPS
Jitter
The checker uses browser animation timing. It is ideal for browser motion, display smoothness, and repeatable comparisons, but it is not a replacement for a game engine benchmark.
Why frame time matters
A frame rate checker should explain smoothness, not just count frames
Average FPS is helpful, but it can hide the reason motion feels rough. If a test averages 120 FPS but frame time jumps between short and long intervals, the motion can still feel uneven. This frame rate checker records frame time samples so you can compare average FPS, 1% low FPS, and jitter together.
Average frame rate
A simple baseline for how many frames your browser renders per second during the test.
Frame time
Milliseconds per frame. Lower and more consistent frame time usually means smoother motion.
1% low FPS
A stutter signal that catches dips hidden by a strong average FPS result.
Jitter
Variation between frame times. High jitter can feel uneven even when FPS looks acceptable.
How to read the result
Use the frame rate checker to separate caps, dips, and unstable pacing
A stable 60 FPS result usually means the browser is matching a 60Hz display path. A result near 120 or 144 FPS can indicate a high-refresh path when frame time is also stable. If average FPS is high but 1% low FPS is much lower, you are probably seeing intermittent dips. If jitter is high, motion may feel uneven even when the average looks good.
Run the frame rate checker with the tab focused and visible.
Use the same browser, power mode, and window size when comparing results.
Compare frame time and 1% low FPS instead of relying only on average FPS.
Run again after changing refresh rate, browser, GPU settings, or battery mode.
Stable 60 FPS
Good for general browsing and many videos. If your display is supposed to run faster, check refresh settings and power controls.
High FPS with dips
A strong average with weak 1% low FPS usually means short interruptions from background load, thermal throttling, or browser scheduling.
Uneven frame time
High jitter can create visible stutter. Compare browsers, disable battery saver, and retest with fewer tabs open.
Why this frame rate checker is different from a simple counter
A simple FPS counter can tell you the current number, but it cannot explain whether the result is dependable. This checker is designed for troubleshooting: run it before and after a change, then compare average FPS, frame time, 1% low FPS, and jitter together. That makes it useful for browser comparisons, display setting checks, laptop power-mode tests, and quick checks after a driver, cable, or monitor change.
FAQ
Common questions about checking frame rate
What does a frame rate checker measure?
It measures how often your browser renders animation frames. This page also calculates average FPS, 1% low FPS, frame time, and jitter to show whether the frame rate is stable or uneven.
Is this the same as an FPS tester?
Yes, the search intent is similar. People may call it a frame rate checker, frame rate tester, FPS tester, FPS checker, or frame rate test online. This page focuses on frame timing details as well as FPS.
Why does frame time matter more than average FPS?
Average FPS can hide short delays. Frame time shows how long each frame takes. Smooth motion usually needs both a strong average and consistent timing between frames.
Can I use this to compare browsers?
Yes. Use the same window size, display, power mode, and run length in each browser. Compare average FPS, 1% low FPS, frame time, and jitter rather than one number.
Can I keep the frame rate checker running?
Yes. The frame rate checker keeps running until you stop it and keeps the latest samples visible in the graph, so frame-time spikes and short dips are easier to catch.
What is a frame-time spike?
A frame-time spike is a frame that takes much longer than the normal pattern. Even if average FPS is high, repeated spikes can make motion feel like it is hitching or stuttering.
What does jitter mean in a frame rate test?
Jitter is the variation between frame times. Low jitter usually feels smooth. High jitter means the browser is rendering frames unevenly, even if the average frame rate looks acceptable.
How is stability different from average FPS?
Average FPS shows the general speed. Stability looks at 1% low FPS, jitter, and spike count so you can see whether that speed is consistent enough to feel smooth.