Why is my website slow, and how to speed it up

Visitors give a website only a few seconds. If nothing appears, many leave, especially on a phone. Google also measures how fast and stable your pages are. The good news: most slow sites are slow for a handful of reasons.

How to check your speed

Test your site with Google's free PageSpeed Insights, and look at the mobile results. It shows the Core Web Vitals: how fast the main content appears, how quickly the page responds and whether the layout jumps while loading. Also simply open your site on your own phone, on mobile data, not on office Wi-Fi. Google's targets for a good experience: the main content within 2.5 seconds, a response to interaction within 200 milliseconds and a layout that does not jump [2]. More about the tool in Google's own documentation [1].

The most common causes

Photos are the most common culprit, so read what photos to use on your website.

Google's guide to images on the web [3] explains how to serve each image in the right size and format.

1. Huge images

Photos straight from a camera or phone can be several megabytes each. A page with ten of them is very heavy. Images should be resized to the size they are shown at, compressed and saved in a modern format.

2. Too many plugins and scripts

Every plugin, chat widget, tracking script, slider and social feed adds weight. Many sites load things nobody uses anymore.

3. Heavy themes and page builders

Generic themes and drag-and-drop builders often load code for hundreds of features, even if the site uses five.

4. Slow or cheap hosting

A slow server delays everything before the page even starts loading. See domain and hosting: how to choose.

5. Too many fonts

Several font families, each in several weights, can delay the text from appearing.

6. Videos and animations

Autoplay videos and complex animations look impressive on a fast computer and painful on an old phone.

What actually helps

1. Resize and compress all images, and load images further down the page only when they are needed.
2. Remove unused plugins, scripts and widgets.
3. Use fewer fonts, and host them yourself.
4. Choose good hosting with caching.
5. Keep the design simple where speed matters most: the top of the homepage.

When to rebuild instead

If a site is built on a heavy theme with many plugins, fixing it can take longer than building a lean version. A modern, lightweight site is often both faster and cheaper to maintain. For example, after rebuilding our own site we brought its mobile performance score up significantly by self-hosting fonts and loading less. A lean rebuild often costs less than people expect: how much a website costs in 2026.

A fast website is mostly the result of leaving things out: lighter images, fewer scripts, less waiting.

Speed is part of the whole

Speed affects both your visitors and your Google ranking: see why your website is not on Google and 10 features every great website should have. Every Studio V1 site is built to load fast on phones from day one: see how we build. Google's web.dev notes that the BBC lost an additional 10% of users for every extra second its site took to load [4], and usability research shows that after about 10 seconds most people's attention is gone [5].

References

1. Google for Developers. "About PageSpeed Insights." developers.google.com
2. web.dev (Google). "Web Vitals." web.dev
3. web.dev (Google). "Learn Images." web.dev
4. web.dev (Google). "Why does speed matter?" web.dev
5. Nielsen Norman Group. "Website Response Times." nngroup.com