Why is this different from Speedtest or Fast.com?

Server location still matters, but this test now uses adaptive parallel transfers and reports the median sustained rate after warm-up. It also reports idle vs loaded latency, jitter, and a usable-internet score instead of treating peak Mbps as the whole result.

What is latency under load?

Idle ping is measured while the line is quiet. Loaded ping is measured while a download is running. The gap is bufferbloat: extra delay from a full router or modem queue. A 200 Mbps line with 300 ms loaded ping feels worse than a 40 Mbps line that stays under 50 ms.

Why might the number be lower than my ISP plan?

We measure the path your browser uses to reach this site, after TCP slow start, using on-the-wire size and elapsed time. Wi-Fi, VPN, browser extensions, and a busy household all reduce typical speed. Plan speeds are a maximum under ideal conditions, and this is not a test to your ISP’s nearest server.

Do you store my speed test?

No. The run happens in your browser. Transfer payloads are discarded after the request. Results stay on this page unless you copy them yourself.

How much data does a test use?

A full run takes about 20–30 seconds and uses at most about 100 MB: up to 64 MB for download and 32 MB for upload, plus a small warm-up. Slower connections stop on time and use less. Payloads are incompressible random data so proxies cannot inflate the result.

Internet speed test

Typical download and upload, idle vs loaded latency, jitter, and a usable-internet score. Individual results are not stored.

Download · Upload · Ping

Warmup
Ping
Download
Upload

Measures typical download and upload, then ping under load.

Takes about 20–30 seconds. Uses up to ~100 MB. Results stay in this browser.

Download

—

To this site

Upload

—

From this browser

Ping

—

Idle latency

Download and upload, live

Adaptive parallel transfers keep the line busy while one-second windows track sustained speed after TCP warm-up.

Loaded ping, not just ping

We measure delay while a download is running. That bufferbloat gap is what actually ruins calls.

Activity verdicts with a cause

4K, games, and meetings are marked ready, tight, or blocked, and we say which metric is in the way.

Stays in your browser

No account, no history sold, no stored result. Copy a summary if you want to keep it.

How this internet speed test works

This browser test measures the path between your device and our test server. It is designed to show sustained, usable performance rather than only the fastest moment of a transfer. Server distance, routing, Wi-Fi, VPNs, other traffic, and the browser can all affect the result.

Step 1
Open the internet speed test and pause other large downloads, uploads, or cloud backups.
Step 2
Select Run speed test, then keep this tab open while idle ping, download, loaded ping, and upload are measured.
Step 3
Review typical Mbps, idle and loaded latency, jitter, bufferbloat grade, usable-internet score, and activity verdicts.

Accuracy, data use, and privacy

What the result represents

The test warms up the connection, adapts from one to four parallel transfers, and uses the median sustained rate. Loaded ping runs during download to reveal bufferbloat. A different provider can report another number because it uses a different server, route, transfer size, stream count, or peak-speed calculation.

Transfer and storage limits

A complete run uses no more than about 100 MB: up to 64 MB down, 32 MB up, and a small warm-up. Slower connections use less. Payloads are random, discarded immediately, and individual results are not stored. Each signed test session expires quickly and cannot exceed its transfer allowance.

For a fair comparison, use the same device and connection, turn off VPNs, pause other traffic, and run several tests at different times. See our measurement methodology for how independent checks are interpreted across the site.

Frequently asked questions

Why is this different from Speedtest or Fast.com?: Server location still matters, but this test now uses adaptive parallel transfers and reports the median sustained rate after warm-up. It also reports idle vs loaded latency, jitter, and a usable-internet score instead of treating peak Mbps as the whole result.
What is latency under load?: Idle ping is measured while the line is quiet. Loaded ping is measured while a download is running. The gap is bufferbloat: extra delay from a full router or modem queue. A 200 Mbps line with 300 ms loaded ping feels worse than a 40 Mbps line that stays under 50 ms.
Why might the number be lower than my ISP plan?: We measure the path your browser uses to reach this site, after TCP slow start, using on-the-wire size and elapsed time. Wi-Fi, VPN, browser extensions, and a busy household all reduce typical speed. Plan speeds are a maximum under ideal conditions, and this is not a test to your ISP’s nearest server.
Do you store my speed test?: No. The run happens in your browser. Transfer payloads are discarded after the request. Results stay on this page unless you copy them yourself.
How much data does a test use?: A full run takes about 20–30 seconds and uses at most about 100 MB: up to 64 MB for download and 32 MB for upload, plus a small warm-up. Slower connections stop on time and use less. Payloads are incompressible random data so proxies cannot inflate the result.