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UK broadband speed test (download speed)

Check your download speed in seconds, then compare broadband deals by postcode.

Quick answer

This free UK speed test measures download speed only. It runs in your browser and usually finishes within 15 seconds.

Privacy first: we do not store IP addresses or results server-side. Results stay on your device unless you save them.

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Download speed only. Pause other downloads for the most accurate result.

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Ready.

Download speed

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Latency

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Jitter

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Test duration: —

Estimated data used: —

Time of test: —

How this works

We estimate download speed by streaming multiple test files, measuring bytes over time, and averaging several rounds until results stabilise.

Measurement notes: Results vary with Wi‑Fi signal, device load, and ISP traffic management. For greater accuracy, test near your router or via Ethernet.

How to get a good result

  • Test near your router or use Ethernet where possible.
  • Pause streaming, downloads, and cloud backups during the test.
  • Run two tests at different times of day for a fair view.
  • If on Wi‑Fi, try 5GHz for less interference.

What affects speed test results

  • Wi‑Fi signal strength and router placement.
  • Network congestion at peak times.
  • Device performance and background apps.
  • ISP traffic management and contention.

Don’t just take our word for it

These are third‑party tools. Their results and privacy practices may differ. Check their sites for details.

Independent

UKSpeedTest

Independent UK-focused speed test with simple results.

Go Community

Broadband Boost

Community speed testing and broadband comparison insights.

Go Latency

Laggy.uk

Latency-focused tests to understand real-world performance.

Go Global

Speedtest.net

Global speed test network with broad coverage.

Go

FAQs

What is a good download speed for streaming?

For HD streaming, aim for 5–10 Mbps per stream. 4K usually needs 25 Mbps or more per stream.

Why is my speed lower than advertised?

Advertised speeds are typical or estimated. Wi‑Fi, network congestion, and device limits can all reduce real‑world results.

Why do results differ between tools?

Each tool uses different servers, payload sizes, and methods. Test twice and compare trends rather than a single number.

Does FibreSwitch store my data?

No. This speed test runs in your browser and does not store IP addresses or results server‑side.

How much data does the test use?

The standard test may use more data on fast lines. Use the “less data” option if you are on a limited plan.

Can I test on mobile data?

Yes, but be aware it will use data allowance and results may vary by coverage and signal strength.

What is Mbps?

Mbps means megabits per second. It measures how quickly data is transferred to your device.

How often should I test?

Test at different times of day if you suspect congestion, or after making changes to your router setup.

Read more: broadband deals, switching broadband, and FTTP vs FTTC guide.

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