A simple, free speed test
This tool is useful for diagnosing connection issues, preparing for video calls, or checking your home setup before joining live online sessions. For the most accurate results, close downloads and streaming apps before you start. VPNs, heavy cloud-sync activity, and security tools scanning traffic can also affect results—if you pause anything temporarily, restart it straight after the test. Once you’re ready, click “Start” to measure your connection.
How the measurement works
To measure speed, our server sends data packets to your device and times how quickly they are received (download) and returned (upload). The test uses multiple packet sizes and runs long enough to provide a stable measurement. During the test, avoid other bandwidth-heavy tasks such as large downloads, video streaming, or file uploads, as they can reduce the available bandwidth and skew results.
What the results mean
This tool measures four key parts of your connection: download speed, upload speed, ping (latency) and jitter. Together, they give a realistic picture of how your internet will behave during live learning and everyday online work.
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Download speed: How quickly data comes from the internet to your device (usually shown in Mbps). Higher download speeds help with streaming, loading websites, downloading course materials and joining video calls smoothly.
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Upload speed: How quickly data leaves your device and reaches the internet (also in Mbps). Strong upload speeds matter for video calls, screen sharing, sending files, and pushing code or projects to the cloud.
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Ping (latency): The time (in milliseconds) it takes for data to travel to a server and back. Lower ping feels more responsive and helps in real-time activities like video calls and interactive learning platforms.
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Jitter: The variation in latency over time. Low jitter means a steadier connection—important for voice and video, where high jitter can cause stutter, dropouts or lag.
Run a few tests for a clearer picture
One test gives a snapshot, but results can change depending on time of day, Wi‑Fi interference, and how many devices are online. For a more reliable view, run the test a few times—ideally at different times (morning, evening) and average the results.
If you’re joining Code Labs Academy from Luxembourg, a stable connection matters as much as headline speed. Knowing your download, upload and latency helps you set up your space for live online learning—whether you’re working from home, studying after work, or joining a weekend session.