Laggy.uk broadband speed test
Laggy.uk is a free UK broadband speed test that measures download speed, latency, and jitter in a retro terminal. Optional sharing and analytics are opt-in.
Help, FAQs, and references
Laggy.uk is a free UK broadband speed test that measures download speed, latency, and jitter in a retro terminal interface. Sharing and analytics are optional and opt-in.
What this page shows
- Live download speed results in Mbps.
- Latency and jitter measurements for responsiveness.
- Optional opt-in sharing and local settings storage.
- Command-based diagnostics like PING, DNS, and SSL.
How to interpret your results
Use the lines below to see whether your connection is fast, responsive, and stable.
What each metric means
- Download shows how fast data arrives for streams and file downloads.
- Latency is round-trip delay to the server.
- Jitter is variation in latency; lower is smoother.
- Packet loss (if shown) indicates dropped data on the path.
What good looks like
- Download: 25+ Mbps for 4K streaming; higher helps busy households.
- Latency: under 30 ms feels snappy; 30–60 ms is OK; 60+ ms can feel laggy.
- Jitter: under 5 ms is good; 5–20 ms is mixed; 20+ ms can cause stutter.
Common scenarios
- Streaming: stable download matters most, with low jitter.
- Gaming: latency and jitter matter more than headline Mbps.
- Video calls: low jitter prevents stutter and dropouts.
- Large downloads: higher Mbps reduces wait times.
What to try next
- Compare Wi‑Fi vs Ethernet.
- Restart your router and retest.
- Reduce background uploads.
- Test at different times of day.
FAQ
- How does the Laggy.uk broadband speed test work?
- Laggy.uk measures download speed by timing file downloads in your browser, then reports download speed, latency, and jitter for a practical view.
- Is the Laggy.uk speed test free?
- Yes. Laggy.uk is free to use with no sign-up or payment.
- Does Laggy.uk store my data or track me?
- Laggy.uk is privacy-first. Analytics run only if you opt in. Device storage is optional for saving settings and results, and sharing is off unless you enable it.
- Why does my internet feel laggy even with high Mbps?
- High Mbps helps downloads, but latency and jitter affect responsiveness. Spikes can cause stutter even when Mbps is high.
- What is latency and what is jitter?
- Latency is the round-trip time to a server. Jitter is how much that latency varies over time.
- How do I share results?
- Use the SHARE command in the terminal to opt in, or keep sharing off by default.