Refresh Rate Tester
Measure your display's refresh rate (Hz), live FPS, and frame timing stability using your browser.
• Use the Fullscreen button to reduce browser throttling.
• Some laptops/desktops use Variable Refresh Rate (VRR). Results may vary by content.
• If the tab loses focus, the test pauses to keep measurements fair.
A refresh rate tester helps you accurately measure how often your display refreshes every second. Whether you’re using a laptop, monitor, phone, or tablet, knowing your screen’s real refresh rate can help you understand performance, smoothness, and display quality.
Our online Refresh Rate Tester works directly in your browser. No downloads, no plugins, and no complicated setup. Just start the test and get instant, reliable results.
What Is Refresh Rate?
Refresh rate is the number of times per second your display updates the image on the screen. It is measured in Hertz (Hz).
Common refresh rates:
- 60Hz – Standard displays
- 75Hz – Slightly smoother than 60Hz
- 120Hz / 144Hz – Gaming and high-performance monitors
- 240Hz+ – Professional esports displays
A higher refresh rate means smoother motion, reduced screen tearing, and better visual clarity, especially during scrolling, gaming, or animations.
How This Refresh Rate Tester Works
This tool uses your browser’s requestAnimationFrame timing to analyze how often frames are rendered on your screen.
It calculates:
- Estimated Refresh Rate (Hz) – Your display’s actual refresh frequency
- Live FPS – Frames per second in real time
- Average FPS – Overall performance during the test
- Min / Max FPS – Performance stability range
- Jitter (Frame Timing Stability) – Lower values mean smoother visuals
All calculations are done locally in your browser, ensuring privacy and accuracy.
Why Your Monitor’s Advertised Refresh Rate Can Be Misleading
Many monitors claim high refresh rates, but real-world performance can differ due to:
- Incorrect system settings
- Browser limitations
- GPU driver issues
- Power saving modes
- External display adapters or cables
This refresh rate tester reveals the actual refresh rate your system is delivering, not just what the manufacturer claims.
Who Should Use This Refresh Rate Tester?
This tool is useful for:
Gamers
Check if your monitor is truly running at 120Hz, 144Hz, or higher.
Developers & Designers
Verify animation smoothness and frame stability during UI testing.
Mobile Users
Test whether your phone really supports high refresh rate modes.
Everyday Users
Ensure your display settings are correctly applied.
How to Use the Refresh Rate Tester
- Click Start Test
- Keep the tab visible (do not switch tabs)
- Let the test run for 10 seconds or more
- View your refresh rate, FPS, and stability data
- Optionally switch to Fullscreen for more accurate results
For best accuracy, close other heavy applications while testing.
Understanding the Results
Estimated Refresh Rate
Shows your screen’s real refresh capability (e.g., ~59.9Hz or ~144Hz).
Live FPS
Real-time frame rendering performance.
Jitter (ms)
Measures frame timing variation.
Lower jitter = smoother experience.
Frame Interval Graph
Visualizes consistency between frames. A flat pattern means stable performance.
Is This Refresh Rate Tester Accurate?
Yes. While browser-based tools cannot replace professional hardware testers, this tool provides highly accurate real-world estimates suitable for:
- Performance verification
- Display troubleshooting
- Everyday testing
Accuracy improves when:
- Running in fullscreen
- Using a modern browser
- Keeping the tab active
Supported Devices & Browsers
✔ Windows
✔ macOS
✔ Linux
✔ Android
✔ iOS
Compatible with:
- Chrome
- Edge
- Firefox
- Safari
No installation required.
Refresh Rate vs FPS – What’s the Difference?
- Refresh Rate (Hz): Capability of the display
- FPS: Frames delivered by the system
A 144Hz monitor running at 60 FPS will still feel like 60 FPS. If you want to test your FPS visit this “FPS counter” .
This tool helps identify both values together, giving a complete picture.
Why Choose This Refresh Rate Tester?
- Free & instant
- No tracking
- Real-time results
- Works on any device
- Clean and simple UI
- Accurate frame timing analysis
Frequently Asked Questions (FAQ)
Can this tool detect 144Hz or 240Hz?
Yes, if your browser and system allow it.
Why does my refresh rate show 59.9 instead of 60?
This is normal due to timing precision and display standards.
Does fullscreen improve accuracy?
Yes, fullscreen reduces background interference.
Is my data stored?
No. All processing happens locally.
Final Thoughts
If you want to check your screen’s real refresh rate, analyze frame stability, or confirm high-refresh support, this Refresh Rate Tester is a simple and effective solution.
Bookmark this page and test your display anytime fast, free, and reliable.