Test your real internet connection — ping, download, and upload speed — measured live in your browser. No installs, no account needed.
Speed Stack tests your real internet connection using Cloudflare's global infrastructure — the same network that powers millions of websites. No Flash, no plugins, just pure browser-based measurement.
Your browser sends a series of tiny requests to Cloudflare's nearest server and measures round-trip time. The lowest reading across multiple samples is used — that's your true latency, not an average.
Files ranging from 500 KB to 25 MB are fetched from the server. Speed is calculated as total bytes transferred divided by total time, giving a real-world average rather than a peak burst.
Your browser sends randomly-generated data payloads to the server. Upload speeds are typically lower than download — that's normal for most home connections.
Your download speed is matched against our rank table. Results are compared to common real-world benchmarks like 4K streaming (25 Mbps) and HD video calls (8 Mbps).
Click Save Image to download a branded screenshot of your speed report — useful for sharing with your ISP if you're troubleshooting slow connections.
ISPs advertise maximum theoretical speeds under ideal conditions. Real-world speeds depend on network congestion, Wi-Fi signal quality, your router, and distance from the server. This test measures your actual current speed.
Under 30ms is excellent for competitive gaming. 30–60ms is very playable. Above 100ms you may start to notice lag in fast-paced games.
A wired ethernet connection eliminates Wi-Fi signal loss and interference. If your Wi-Fi speed is significantly lower than your wired speed, your router or signal strength may be the bottleneck.
Yes — results can vary slightly depending on network load at the time of testing. Running 3–5 tests and averaging them gives a more reliable picture of your connection.