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Free Internet Speed Test — Download, Upload & Latency

Download, upload, and latency measurement.

Measure your connection speed with ping, download, and estimated upload.

Download

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Mbps

Upload

—

Mbps (estimate)

Ping

—

ms

How it works

How to use the network speed test

Click Start Test to begin. The tool first measures your ping (latency) by sending several small requests and taking the fastest response. Next, it runs a download test by fetching a payload through your browser and timing the transfer. Finally, an upload estimate is calculated based on your download speed — true upload measurement requires a server on the other end to receive data, which this browser tool cannot do alone.

For best results, close other bandwidth-heavy applications, connect via Ethernet if possible, and run the test multiple times at different hours to see your connection's typical range.

Understanding your results

Download speed

This measures how fast data travels from the internet to your device. Higher is better for streaming 4K video (25+ Mbps), large file downloads, and smooth browsing. Most home connections range from 50-500 Mbps on cable and 300-1000+ Mbps on fiber.

Upload speed

This affects video calls, file uploads, cloud backups, and livestreaming. Because this tool cannot receive data from your browser, upload is estimated from your download speed using a typical ratio. If you need exact upload numbers, use a dedicated speed test service.

Ping and jitter

Ping is the time it takes for a tiny packet to reach a server and come back. Low ping is critical for gaming, video calls, and real-time applications. Jitter measures the variability in ping — even moderate ping with high jitter can cause stuttering in calls and games. A stable connection is worth more than raw speed for most real-time use.

What affects speed test accuracy

Browser speed tests are inherently less precise than dedicated apps because they compete for bandwidth with other browser processes and extensions, and they are limited by JavaScript's single-threaded nature. Wi-Fi interference, VPN encryption overhead, and ISP traffic shaping can all skew results. Treat browser-based tests as a useful indicator rather than a definitive benchmark.

Related tools

Frequently Asked Questions

What factors affect my speed test results? expand_more
Results vary based on your connection type (fiber, cable, DSL, 5G), network congestion (peak vs off-peak hours), Wi-Fi signal strength, number of connected devices, background downloads or updates running on your machine, and even the browser or device you are using. Running multiple tests at different times gives the most accurate picture.
What is the difference between Mbps and MB/s? expand_more
Megabits per second (Mbps) measures network speed. Megabytes per second (MB/s) measures file transfer speed. There are 8 bits in a byte, so 100 Mbps equals 12.5 MB/s. Internet plans are advertised in Mbps, but file downloads in your browser show MB/s — divide by 8 to compare.
What is a good ping, and what is bad? expand_more
Ping under 20 ms is excellent (fiber, local server). 20-50 ms is good for gaming and video calls. 50-100 ms is average (4G, distant servers). 100-200 ms is noticeable lag. Above 200 ms makes real-time applications difficult. Ping matters most for gaming, VoIP, and video conferencing.
Why is my upload speed lower than download? expand_more
Most consumer internet plans are asymmetric — they allocate more bandwidth to download than upload because typical usage (streaming, browsing) downloads far more than it uploads. Fiber plans often offer symmetrical speeds. This tool marks upload as "estimate" because true upload measurement requires a receiving server.
Does browser choice affect speed test results? expand_more
Yes. Chrome and Firefox typically perform similarly, but Safari has different network stack behavior and may show different results. Browser extensions (ad blockers, VPNs, proxies) can significantly affect measurements. For the most accurate result, run the test with extensions disabled and on a wired connection.