Fix a specific internet problem
Not sure which test you need? Start with the problem you are actually having. Each guide below runs the one test that pinpoints it, explains what your result means, and gives you the fix, in plain English.
Featured guides
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Speed
- Internet speed test: how to actually get the speed you pay for
- Bufferbloat: why fast internet still lags -- and how to fix it
- Latency and ping: why fast internet still isn't enough
- Fast internet but Zoom or Teams keeps freezing? Fix the jitter
- Packet loss: how to find it and make your ISP actually fix it
- What to tell your ISP about slow internet: the call script that gets a technician
- Lag is not a speed problem: the gamer's guide to a connection that holds up in a match
- Your internet is fast. Your Zoom calls still freeze. Here is the number nobody checked.
- Netflix keeps buffering on a fast plan. The line is almost never the problem.
Privacy
- DNS leaks: what your "phone book" lookups reveal about you
- WebRTC leaks: the browser feature that can reveal your real IP
- How websites spot a VPN, and what you can honestly do about it
- IPv6 for humans: what it is and why you probably want it on
- Timezone mismatch: the clock that quietly gives away your VPN