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Broadband speed test

By Jon Barrow

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Broadband speed test

If your download speeds seem slower than you'd expect, then check how fast they actually are with our free speed test checker.

Are you getting the broadband speed you were promised by your provider? Use our free speed test to investigate, then find out what to do if your broadband speed is too slow.

If it takes an age to access the internet, then it could be that you're not getting the download speeds originally promised when you signed up to your broadband provider. That's where our broadband speed test comes in. It lets you track your home internet connection to see how it measures up to the download speed you thought was guaranteed.

Keep reading to use our free broadband speed test, and to find out how you can use the results to make a complaint to your broadband provider.

Fed up with slow speeds and poor customer service? Then switch to a Which? Recommended Provider - the best broadband companies out there, as rated by thousands of real customers.

How to use our broadband speed test tool

Before you make a complaint to your ISP about slow broadband, it's worth gathering enough evidence to back up your claim.

Simply click the ‘Start speed test' button on the tool above to begin testing your broadband speed. 

Simply click the 'Start' button below to launch the broadband speed testing tool.


We suggest you run several tests during a single week, in peak usage time (between 5pm-11pm) and during off-peak times.

  • The speed test should be run on a desktop PC, all-in-one PC or laptop - results on a mobile phone or tablet may not be 100% accurate.
  • For the most accurate results, you should consider connecting your PC to your router via a network cable before running the test.

Which? Recommended Broadband Providers

Are you unhappy with your current broadband provider? If so, we can tell you which broadband services are recommended by thousands of users in our latest survey. The names may surprise you but both offer decent speeds and great customer service.

Take a Which? trial for £1 or, if you're a member, simply log-in to unlock the table below:

Which? Recommended Providers - Broadband
Provider Which?
Connection speed Connection reliability Customer service Value for money Customer score
Subscriber only content Which? Recommended badge good excellent excellent average 86%
Subscriber only content Which? Recommended badge good good excellent excellent 81%

Using the broadband checker to complain to your ISP

If your speeds are significantly less than you expected, your broadband provider may be in breach of contract. We suggest calling your ISP as a first step to see what it can do. Start by providing evidence of your internet speeds – it's a good idea to keep a diary of interruptions and to regularly use the speed checker tool to build up a picture of your service.

If you're not happy with your ISP's response, then follow our guide on How to complain about your broadband speed.

How to boost your download speed

As well as speaking to your provider, there are simple steps you can take to speed up your connection. Changing your router, or just moving it, can make a big difference.

Find more tips in our speed up slow broadband guide or find out how to speed up a slow PC in our easy to follow advice guide.

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