SpeedWatch tests, grades, and monitors your internet connection — then explains what's actually going on, in plain English.
Not just a speed number. A complete diagnosis of your internet connection.
M-Lab NDT7 powered. Choose Quick, Balanced, or Thorough test modes depending on what you need.
Get an A–F health grade covering packet loss, bufferbloat, and latency stability — with plain English explanations of what it means.
Schedule tests to run automatically. Get alerts when speeds drop below your threshold. Runs quietly in the background.
Full test history with trend charts. See peak vs off-peak performance and spot patterns your ISP won't tell you about.
Compare actual speeds against what you're paying for. Export evidence for complaints or Ofcom.
All data stored locally by default. No tracking, no ads, no accounts. Built on open source test infrastructure you can verify.
Opt in to share anonymised results and help build a real picture of UK broadband performance — area by area, ISP by ISP.
Other speed tests show you a number. SpeedWatch shows you a diagnosis.
Your connection gets a grade based on real TCP diagnostic data — download, upload, latency, jitter, packet loss, and bufferbloat.
The same metrics network engineers use to diagnose problems — presented in plain English anyone can understand.
Know why your video calls drop. Know why gaming lags at 8pm. SpeedWatch explains the cause, not just the symptom.
Up and running in under 30 seconds.
Add SpeedWatch from the Chrome Web Store. One click, no account needed.
Run your first test — or let auto-monitoring handle it for you.
See diagnostics — not just speed, but why your connection behaves the way it does.
Monitor trends over time. Export evidence when you need to hold your ISP accountable.
Of UK households don't get the speeds they're paying for
Average annual overpayment for underperforming broadband
Typical wait to get an engineer visit that often finds "no fault"
No premium tier. No ads. No data selling. Just a tool that works.
Forever free. Open source.
Install SpeedWatch and find out what's really happening with your broadband.