Speed Test
Internet Speed Test at Your Address 2026
Free · No download required · Results in ~30 seconds
Test your real download speed, upload speed, and latency. Compare your results to your ISP’s advertised speeds and find out if you’re being underserved.
Mbps
Click Start to test your connection speed.
What Your Speed Test Shows
Download Speed
How fast data travels from the internet to your device. Affects streaming, browsing, and file downloads. The FCC minimum is 100 Mbps (2024 standard). Most households need 200–500 Mbps.
Upload Speed
How fast data travels from your device to the internet. Critical for video calls, live streaming, and cloud backups. Cable plans are asymmetrical — a 300 Mbps download plan may only give 15–25 Mbps upload. Fiber gives equal speeds both ways.
Ping and Jitter
Ping is round-trip time in milliseconds — under 30ms is good, under 10ms is excellent. Jitter is how much ping varies between requests. Under 10ms jitter means a stable connection. High jitter causes choppy video calls and inconsistent gaming even if average ping looks fine.
Why Results Differ from Your Plan
Wi-Fi overhead, router bottlenecks, peak-hour cable congestion, and device limitations all reduce measured speed. Test over ethernet for the most accurate reading. If you consistently get less than 60% of advertised speed on ethernet during off-peak hours, contact your ISP.
How This Test Works — and Why It’s Different
Most online speed tests give you a single number after a few seconds. This one tells you more about your actual connection by running 4 parallel download streams, 3 sequential upload bursts, and 10 latency probes — all using your browser’s built-in XMLHttpRequest API. No Flash, no Java, no app download. Results are ready in about 15 seconds.
How it measures download speed
4 simultaneous XHR requests each download a 10 MB file from speed.cloudflare.com — Cloudflare’s global network with edge servers in 300+ cities. Using 4 parallel streams better reflects how real-world browsing works (browsers open multiple connections simultaneously), so the result is more accurate for fast connections than a single-stream test.
How it measures upload speed
3 sequential POST requests each send a 1.5 MB payload to Cloudflare’s upload endpoint, using onprogress events to track bytes in real time. Upload is measured sequentially (not parallel) to avoid overwhelming asymmetric cable upload channels, giving a more stable reading.
How it measures ping and jitter
10 sequential zero-byte requests measure round-trip time using performance.now() — the browser’s high-resolution timer. Jitter is calculated as the average deviation between consecutive pings. This captures connection stability, not just average latency.
| Tool | Infrastructure | Streams | Upload | Ping + Jitter |
|---|---|---|---|---|
| This test | Cloudflare (300+ cities) | 4 parallel | ✓ Yes | ✓ 10 probes |
| Speedtest.net (Ookla) | ISP-sponsored servers | Multi | ✓ Yes | ✓ Yes |
| Fast.com (Netflix) | Netflix CDN only | Single | Hidden by default | ✖ No |
| Google Speed Test | M-Lab (throttled by some ISPs) | Single | ✖ No | ✖ No |
Why not use Speedtest.net? Ookla is owned by Ziff Davis, whose revenue comes from ISP advertising partnerships. Cloudflare has no relationship with ISPs — it’s a neutral network that ISPs cannot optimize for. Results here often show lower numbers than Ookla, but they’re a more honest reflection of your real connection speed.
Why not use Fast.com? Fast.com only measures speed to Netflix’s own CDN. If your ISP throttles Netflix traffic (a documented practice before Net Neutrality enforcement), Fast.com results will be lower than your actual speed. This test uses Cloudflare, which no ISP specifically prioritizes or throttles.
Speed Test Questions
Data: Tests use speed.cloudflare.com endpoints. Latency is the median of 10 round-trip requests. Download uses 4 parallel 10MB streams to properly saturate the connection. Upload uses 3 x 1.5MB POSTs. Results vary by time of day, device, and distance to Cloudflare PoP.