HomeNetwork & IPInternet Speed Test

Internet Speed Test

Measure your download & upload speed and latency.

Partly uses our server. Your browser measures directly against our dedicated speed-test servers (Germany/USA) — never proxied through this site. All the math (Mbps, jitter, bufferbloat grade) happens locally in your browser; nothing is sent back to us beyond the raw test transfers themselves. Server logs briefly capture your IP for abuse prevention, same as any other network tool here — never for tracking.

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How this test works
You'll get: Download Upload Ping Jitter Packet loss Bufferbloat

What it does

Measures your connection's download speed, upload speed, ping (latency), jitter, packet loss, and bufferbloat — how much your latency worsens while the line is busy. Download/upload run several parallel connections for several seconds each against a dedicated test server (you can pick the region); ping is measured separately both at rest and while the download/upload is running, since a connection that's fast but chokes under load causes real problems (laggy video calls, jittery gaming) that a plain Mbps number won't show.

Tips

  • •Wi-Fi adds its own variability — for the most accurate number, test over a wired connection if you can.
  • •Close other downloads, uploads, cloud backups, and streaming before testing; they compete for the same bandwidth.
  • •A high bufferbloat grade (C or worse) means your connection likely gets laggy during large downloads/uploads even if your plain speed numbers look fine — often fixable with a router that supports modern queue management (e.g. FQ_CoDel or 'Smart Queue Management').

Fun facts

  • ★'Bufferbloat' happens because routers buffer (queue) packets rather than dropping them when busy, so a large queue can add hundreds of milliseconds of delay to every packet behind it — including your video call — even though nothing was technically lost.
  • ★Mbps (megabits per second) and MB/s (megabytes per second) are different by a factor of 8 — a '100 Mbps' connection tops out around 12.5 MB/s in a file-download progress bar.

A bit of history

Early consumer speed tests only reported download speed, since that's what mattered for the web pages and downloads people cared about in the dial-up and early broadband era. Upload speed became relevant with video calls and cloud backups; bufferbloat wasn't identified and named until Jim Gettys' research around 2010, explaining why a connection could be fast on paper yet feel laggy under load.

Common questions

My download bar shows way less than the '100 Mbps' my plan advertises — is my connection broken?

Probably not — this is almost always the Mbps-vs-MB/s confusion: a '100 Mbps' plan is measured in megabits, but most download progress bars show megabytes, and there are 8 bits in a byte, so a fully-performing 100 Mbps connection tops out around 12.5 MB/s in a file-download dialog. Check the units before assuming the connection is underperforming.

My speed test numbers look great but video calls still get laggy during a big download — why?

That's classic bufferbloat, not a speed problem — routers queue packets rather than dropping them when the line is busy, so a large queue can add hundreds of milliseconds of delay to every packet behind it (including your call's audio/video) even though your raw Mbps numbers look completely fine. A bufferbloat grade of C or worse on this test flags exactly that gap between 'fast' and 'not laggy under load'.