All Device Performance & Screen Testing Tools
Discover the best free online testing tools to check your device performance, monitor FPS and refresh rate, test mouse speed, measure reaction time, and detect screen issues like dead pixels or backlight bleeding. Use these tools to quickly analyze, optimize, and improve your display quality and input accuracy—all in one place.
Performance Testing
Frame Rate Test
Measure real-time FPS to see how smoothly your device renders graphics.
- Live FPS monitor
- Stress test modes
- Performance charts
Reaction Time Test
Measure reflex speed with an online reaction timer and track your best scores.
- Visual cue timer
- Best-time history
- Latency tips
Display Testing
Refresh Rate Test
Check your screen’s true refresh rate (Hz) and confirm it matches your monitor spec.
- Accurate Hz reading
- Jitter detection
- Desktop & mobile
Dead Pixel Tester
Find dead or stuck pixels using high-contrast full-screen color patterns.
- Solid color screens
- Pixel grid helper
- Easy spotting
Screen Bleeding Test
Detect backlight bleed and check panel uniformity with dark & gradient screens.
- Edge bleed check
- Uniformity view
- Full-screen mode
Input Testing
Mouse Polling Rate Tester
Measure polling rate (Hz) and responsiveness for gaming & precision work.
- 125–1000 Hz support
- Real-time graph
- Latency hints
Mouse Scroll Wheel Test
Check scroll speed, steps, and direction accuracy in real time.
- Step detection
- Max speed meter
- Direction check
Spacebar Click Test
Test keyboard speed by counting spacebar clicks per second or over time.
- CPS counter
- Custom timers
- Mobile friendly