How to Test Internet Speed Accurately

Before You Start

Pause downloads, software updates, cloud backups, video calls, and streaming on the test device. Other devices on the same connection can also consume capacity. If practical, record whether the device uses Ethernet, 2.4 GHz Wi-Fi, 5 GHz Wi-Fi, or another connection.

Step 1: Start the Speed Test

Select Start speed test. The browser first checks latency, then download throughput, and finally upload throughput. The adaptive test can transfer up to about 270 MB in a high-speed case, so avoid running it on a metered connection unless that data use is acceptable.

Step 2: Watch the Test Progress

The phase label and progress bar identify the current measurement. The gauge updates as measured download or upload rounds finish. Use Stop if you need to cancel; a stopped or timed-out test does not publish a partial final result.

Step 3: Read the Results

• Download: higher Mbps means more data reached the browser each second on this route.
• Upload: higher Mbps means more data reached the server each second.
• Latency: lower milliseconds generally means a quicker response.
• Jitter: lower values generally indicate more consistent adjacent latency samples.

The interpretation also estimates a 100 MB download and reports the spread between the slowest and fastest measured rounds.

Run a Cleaner Wi-Fi Test

Test near the router, then test where the device is normally used. Walls, distance, interference, the selected radio band, router capability, and the client device can all affect Wi-Fi. Compare the same device over Ethernet when possible to separate Wi-Fi conditions from the wider connection.

Repeat and Compare Like With Like

Run several tests rather than relying on one result. Keep the device, server, VPN state, connection type, and background activity similar. Tests at different times can reveal congestion or shared-demand patterns.

Download the PDF Report

After a completed test, select Download PDF. The report includes download, upload, latency, jitter, timestamp, payload totals, individual samples, and the approximate 100 MB download time.

Understand the Local Development Warning

When the page runs on localhost, requests may travel only between the browser and the same computer. Those very fast values do not measure the public internet. Deploy the application to a remote server before interpreting it as an internet speed test.

What This Test Cannot Prove

The result does not certify the maximum broadband line rate, measure every destination, remove all protocol overhead, or report packet loss and loaded latency. Browser scheduling, Wi-Fi, other traffic, VPNs, routing, server distance, and server load can change the result.