Speed test tools online are bloated. 5MB of JavaScript, 47 tracking cookies, and they still ask for your email.
I built one in 5KB of vanilla JS. No dependencies. No cookies. No tracking.
It measures download speed, upload speed, and latency. That's it.
Try it: dsl.nevik.de
The implementation is simple. Download a known-size file, measure how long it takes, calculate Mbps. Upload is the reverse. Latency is a small fetch request with timing.
No WebRTC, no Flash, no Java applets. Just fetch() and performance.now().
After running the speed test, it shows available DSL tariffs for your connection. That part uses the Check24 partner API (I'm in their affiliate program). The tariff comparison is optional, the speed test itself is standalone.
If you're wondering whether your DSL speed is actually what you pay for: dsl.nevik.de
It takes 15 seconds and tells you the truth. No signup.
I also have a DSL tariff comparison at the same URL if you want to see what faster plans cost at your address.
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