Slow website? Here's how to measure where you stand in five minutes

A slow website costs you visitors and search visibility — and over the summer, sites quietly get slower. Here's how to measure where you stand and what you can fix yourself.

Early August, everyone's getting back into the swing of things. Holidays are over, calendars are filling up again — and that's exactly when many business owners think: I kept meaning to do something about the website. Before you dive into big plans (new copy, different photos, maybe a full redesign), there's one thing that costs little and pays off a lot: checking how fast your site actually is.

Because a slow website costs you visitors. Not maybe — provably. And it costs you visibility in Google too. In this post we explain why, how to measure it, and what you can do yourself without going down any rabbit holes.

Why speed matters more than it did a year ago

Two things have shifted recently. First: visitors have become less patient. If your site takes longer than three seconds to show something useful, a large share of them will simply leave. That's not a gut feeling — it's right there in the analytics of almost every site we look at.

Second: Google has been factoring in "user experience" in search rankings for a while now. In practice, that means a painfully slow site loses ground to a faster competitor offering roughly the same thing — even if you're doing nothing wrong. You just quietly slip down the results.

And there's a third thing we see in practice all the time: sites get slower without anyone noticing. Someone adds a chat widget, a cookie banner, a video background, a few extra social media plug-ins. Each individual addition seems harmless. Together, they make your site a few tenths of a second slower every quarter — until someone finally mentions it.

How to know where you stand in five minutes

You don't need dashboards or complicated tools to measure this. You can simply check it yourself:

1. Do it on your phone, not your desktop PC. Most visitors arrive on mobile, and on mobile a site is always slower than on your office's fibre-optic Wi-Fi.
2. Switch to mobile data instead of Wi-Fi. That way you're testing under roughly the same conditions as your customers.
3. Open your site from a blank tab and count calmly. If you're at four seconds with nothing useful on screen yet, there's work to be done.
4. Then click through to a second page — a product page or a service. Often the homepage is just about acceptable, but the "deeper" pages are where things slow down.

Want something more objective? Use our speed test to rule out your own connection, so you know whether the issue is on your end or the site's. That saves a lot of back-and-forth when you call a developer later.

The four causes we see most often

1. Heavy images

By far the most common culprit. Someone uploaded a photo straight from their camera — 6 MB, 4,000 pixels wide — and WordPress happily serves it to everyone. On most sites, 200 KB per image is more than enough, as long as it's saved properly. Bringing photos down to that size often makes a site load twice as fast in one go.

2. Too many plug-ins

Especially with WordPress: everything you install stays active, even when you no longer use it. Every plug-in adds a small extra bit of load time — sometimes a large one. The rule of thumb: fewer than twenty active plug-ins is fine, between twenty and thirty starts getting tricky, and above that it's simply too much for most sites.

3. Third-party scripts

Chat widgets, embedded YouTube videos, Facebook pixels, Google Maps, booking system integrations — all useful, but all things that have to load from someone else's servers before your page is complete. If that third party is having a slow day, you foot the bill.

4. Outdated hosting

Still on a budget package from a few years ago? It happens. But many SMB sites have outgrown their plan by now and would run noticeably faster on a more modern package — or a different host. Often at no extra cost, sometimes even cheaper.

What you can do yourself this week

• Go through your five most important pages on your phone and note the load time for each.
• Check your media library for the ten largest files. If any images are over 500 KB, that's your first clean-up job.
• Make a list of plug-ins you no longer recognise or use. Don't delete anything yet — just note what it is and when you turned it on.
• Check whether your hosting plan still matches your current level of traffic.

All of these things can be done in small steps. You don't need to turn everything upside down at once.

When should you bring in help?

When you notice your site still feels slow after tidying things up, or when you're not confident you can make changes without breaking something. You don't need to sit on that for weeks. A quick speed check gives you clarity in a few hours — what the gains could be and where to start. Often 80% of the slowdown comes from just two or three things, and those turn out to be surprisingly quick to fix.

You'll reap the benefits for the rest of the year. And so will your visitors.