LIVE FPS + JANK CHECKER

LIVE FPS

This frame rate checker measures browser rendering cadence with live FPS.

It also shows frame-time quality: P95 ms, jank and large frame spikes.

Use it to compare browsers, battery modes, screens and performance settings.

WHO USES IT?

Gamers, display testers, web developers, reviewers and phone/tablet users.

It is useful when checking smooth scrolling, stutter, throttling or high refresh.

COMMON SEARCHES

frame rate checker • FPS test • browser FPS test

frame time test • jank test • stutter test • V-Sync checker

BASIC STEPS

1) Set LOAD on Page 1.

2) Press START for fullscreen.

3) Watch FPS, P95 ms, JANK and SPIKES.

4) Exit with ESC or tap/click.

HUD MEANINGS

FPS: smoothed frames per second.

P95 ms: slower-frame timing; lower is smoother.

JANK: frames over 20 ms. SPIKES: frames over 33 ms.

DEVICE GUIDANCE

Disable low-power mode before testing high refresh screens.

Hot phones or laptops can throttle and reduce smoothness.

Try different browsers because animation timing can differ.

QUESTIONS

Is this true display Hz? It measures browser frame cadence.

Why 60 or 120? Browser animation is usually synced to screen refresh.

Why FPS drops? Throttling, heavy tabs, heat or battery saver can interfere.

WHY FPS IS NOT ENOUGH

Average FPS can look fine while frame timing still feels bad.

A stable 60 FPS can feel smoother than unstable 90 FPS.

P95, jank and spikes help reveal uneven motion.

MINI BLOG

Consistency matters as much as peak frame rate.

Frame time reveals hitching better than FPS alone.

Load testing helps expose performance headroom.

RELATED TOOLS

P790 Advanced Display Tools • P791 Motion Blur Test

P793 Refresh Rate Visualiser • P795 Camera Sync Test

Previous: P791 Motion Blur • Next: P793 Refresh Rate

USAGE PATH

Start with Frame Rate Checker, then compare Motion Blur and Refresh Rate pages.

Use Camera Sync when filming a screen or checking rolling shutter behaviour.

NAVIGATION

Footer links connect HOME, INDEX, PREVIOUS and NEXT.

The internal pager uses the same button names on every page.

PRIMARY PHRASE

frame rate checker is the main search phrase for Teletext-Tools page 792.

The page offers a working live FPS and frame-time browser test.

CODE HIGHLIGHT

<title> names live FPS, frame time and jank.

canonical points to /frame-rate-checker/.

SEARCH INTENT

Users want a quick way to check browser FPS, stutter and animation smoothness.

Page 1 answers that intent with controls, preview, HUD and fullscreen launch.

FPS TEST TERMS

FPS test, browser FPS test and live FPS meter are important related phrases.

Frame time checker and jank test capture the quality side of smoothness.

CODE HIGHLIGHT

makeStats() stores FPS, frame-time ring buffer, jank and spike counters.

drawHUD() prints FPS, P95 ms, JANK and SPIKES on the canvas.

READABILITY

SEO text is not squeezed beside the live FPS canvas and controls.

Large internal panels keep help copy readable on desktop, tablet and mobile.

TOOL FEATURES

The LOAD slider simulates extra work to reveal stutter and performance headroom.

The HUD toggle keeps the live display clean when comparison only needs motion.

CODE HIGHLIGHT

loadRange controls simulated work.

hudToggle switches the live FPS overlay on and off.

USER BENEFIT

Load control helps expose when a browser or device starts dropping frames.

HUD numbers help compare modes using the same visible scene.

FULLSCREEN VALUE

Fullscreen mode removes page UI and gives a cleaner animation cadence check.

The fullscreen layer remains easy to exit with ESC, tap or click.

CODE HIGHLIGHT

fx is the fixed fullscreen test layer.

fxCatch catches tap and click exits above the fullscreen canvas.

INTERNAL LINKING

Advanced Display Tools links this checker with motion and refresh tools.

Footer PREVIOUS goes to P791 and NEXT goes to P793.

SEO SUMMARY

Best folder: /frame-rate-checker/

Canonical URL matches the recommended folder exactly.

Tool stays on Page 1; help and search intent are split across later pages.

KEYWORDS

frame rate checker • FPS test • live FPS meter

frame time checker • jank test • stutter checker

browser smoothness test • V-Sync test • performance monitor

CODE HIGHLIGHT

meta description names live FPS, frame time, jank, fullscreen motion and HUD.

robots allows indexing with large preview settings.