WiFi Speed Check

What is this tool?

WiFi Speed Check measures your real internet connection performance directly in your browser using high-resolution performance timers and progressive HTTP fetch streams.

The test measures round-trip HTTP latency (ping) across multiple requests, calculates packet jitter, streams chunked binary payloads to measure download Mbps, and measures upload throughput where network policies permit.

It reads browser network telemetry via navigator.connection (such as downlink and RTT estimates) and clearly identifies them as browser estimates rather than physical test results.

Zero simulated data or fake Mbps values are shown. If a measurement cannot be reliably completed, the tool displays an honest status.

How to use it

1. Connect your device to your WiFi networkEnsure your phone, tablet, laptop, or desktop is connected to your primary WiFi router network (5 GHz band recommended).
2. Close background downloads and streamingPause active file downloads, torrents, or streaming media to ensure your full bandwidth is measured.
3. Click Start TestThe engine runs sequential latency checks, streams progressive data chunks to measure download speed, and tests upload packets.
4. Review your detailed metricsInspect your download Mbps, upload Mbps, ping, jitter, test duration, and connection quality interpretation.

What the results mean

Download Throughput (Mbps)

Calculated from actual bytes received over elapsed time: (bytes * 8) / seconds / 1,000,000.

Upload Throughput (Mbps)

Calculated from actual binary payload bytes transmitted to the test endpoint over elapsed duration.

Ping / Latency (ms)

Round-trip time for network packets between your browser and the CDN edge server.

Jitter (ms)

Mean variance between successive latency samples indicating network stability.

Tips

• To test WiFi coverage in different rooms, run the test near your router and then repeat it in distant rooms to identify signal dead zones.
• If you are connected to a VPN, your traffic routes through an intermediary server which can reduce measured speed and increase latency.
• Remember that browser speed tests measure internet throughput; physical WiFi signal strength (dBm) cannot be directly read by web pages.

Troubleshooting

Related documentation

• MobileFind My IPYour public IP with an IPv4 or IPv6 label, a locally read device panel, an approximate IP location panel and an OpenStreetMap pin. Copy and refresh, no permission prompt.
• MobileMobile Device TestA thirteen-item capability scan of your phone — touch, sensors, screen, camera, microphone, audio, network, battery, haptics and wake lock — in one page.
• KeyboardKeyboard Polling Rate TestMeasures the auto-repeat rate in Hz while you hold a key, with jitter and consistency.
• DisplayDisplay FPS TestMeasure the frame rate your browser is actually delivering, with 1% lows and jitter.