Sustainable Website Design: 10 Actions to Make Your Site Greener in 2026

Sustainable website design doesn’t mean compromising on looks or performance. In fact, the actions that reduce your site’s environmental impact are the same ones that make it easier to use, and better ranked in Google. It is one of the most practical steps a business can take to reduce its digital footprint.

Your website has a carbon footprint, and it’s probably bigger than you think. Data centres currently consume about 3% of the global electricity supply and account for approximately 2% of greenhouse gas emissions. With billions of web pages online, the internet’s collective impact on our climate is enormous. 

Here are 10 practical actions you can take to build or transform your website into a greener, leaner digital presence.

How to Create a Sustainable Website

1. Switch to Green Hosting

The single highest-impact change you can make is switching to a green hosting provider. Have a read about why green hosting is important here. Your hosting is responsible for a significant share of your website’s energy consumption and most traditional hosting runs on fossil fuel-powered data centres.

Green hosting uses servers powered entirely by renewable energy sources such as wind and solar. It reduces your digital carbon footprint directly, with no changes needed to your website itself. It’s also increasingly a signal that matters to environmentally conscious customers.

At Solve, every website we host runs on 100% renewable energy. We’re a certified B Corp digital marketing agency and one of the UK’s greenest hosting providers. Not only that, but we plant trees with every hosting plan. On average, sites that migrate to our optimised green hosting see a 132% improvement in performance.

Look for providers verified by the Green Web Foundation, or ask your current host directly about their energy source. If they can’t answer clearly, it’s time to make the switch to green hosting.

2. Choose a Lightweight, Efficient Framework

Not all website builders are created equal. Some are code-heavy by default, loading unnecessary scripts, plugins, and resources on every page even when they’re not needed. This adds weight to your site and increases energy use with every visit.

Low carbon website design starts at the build stage. Choosing a framework that’s built for performance and efficiency makes a material difference to both your site’s speed and its environmental impact.

At Solve, we’ve spent years developing our own lightweight WordPress framework, optimised specifically for performance, sustainability, and accessibility.  

• Avoid page builders that load large JavaScript libraries globally
• Use a theme or framework built around performance, not visual drag-and-drop ease
• Regularly audit what scripts and plugins are actually active and necessary

3. Optimise Your Cache

A website cache stores temporary copies of your pages so that returning visitors don’t need to reload everything from scratch on each visit. Less data transferred means less energy used, and a much faster experience for your users.

Most WordPress sites can implement caching through a plugin, but the key is configuring it correctly. Poorly set caches can serve outdated content, while well-optimised caching can dramatically reduce server load and improve your Google PageSpeed score.

• Use a reputable caching plugin (e.g. WP Rocket, W3 Total Cache)
• Enable browser caching so repeat visitors load pages from their local storage
• Set sensible expiry times;  longer for static assets like logos, shorter for frequently updated content

4. Resize and Compress Your Images

Image sizes are consistently the biggest contributor to page weight. A single unoptimised image can be larger than an entire well-built web page. Across thousands of visits, oversized images translate into enormous amounts of unnecessary data transfer.

Sustainable website design means serving images at exactly the right size and format (no larger than needed for the screen they’ll be viewed on).

• Convert images to modern formats such as WebP or AVIF – these offer the same visual quality at 25–50% smaller file sizes compared to JPEGs
• Always resize images to the maximum display size before uploading and don’t rely on CSS to scale them down
• Use tools like Squoosh, ShortPixel, or Imagify to compress images without visible quality loss
• In WordPress, plugins can automate this on upload; look for tools that convert to WebP automatically

The payoff is significant: faster load times, lower bounce rates, better Core Web Vitals scores, and a lighter environmental footprint.

5. Implement Lazy Loading

By default, most websites load every image and video on a page as soon as it’s requested, including content that’s far below the fold and may never actually be seen. This wastes bandwidth and energy on content that doesn’t get viewed.

Lazy loading changes this behaviour. Images and videos only load when they’re about to enter the user’s viewport. For a page with lots of visuals, this can dramatically reduce initial load time and data transfer.

Lazy loading is now supported natively in modern browsers with a simple HTML attribute (loading=”lazy”), making it easier than ever to implement without additional plugins. It’s recommended by Google’s PageSpeed Insights and is a standard practice in sustainable website design.

6. Use Video Strategically

Video is one of the most powerful tools for engaging website visitors, but it’s also one of the heaviest in terms of data and energy. A single auto-playing background video can consume more bandwidth in seconds than an entire optimised web page.

• Never host video directly on your server, instead embed from YouTube or Vimeo instead
• Always disable autoplay; let users choose whether to watch
• Use the lowest resolution appropriate for the display context
• Consider using a poster image (a static frame) that only triggers the video on click
• For ambient or background video effects, consider using a short, looping animation in place of full-resolution video

These changes reduce your site’s data footprint significantly and give users a better experience, especially on mobile connections.

7. Audit and Clean Up Your Website Regularly

Every piece of content, every plugin, every unused image in your media library adds weight to your website. Over time, sites accumulate outdated pages, orphaned posts, redundant plugins, and duplicate content, all of which consume server resources and increase your site’s environmental impact.

A regular website audit helps keep things lean and efficient. This is also good housekeeping from an SEO perspective, as thin or outdated content can drag down your overall site quality in Google’s eyes.

• Delete or consolidate pages and posts that are outdated, thin, or duplicated
• Remove inactive plugins (each one can add overhead even when switched off)
• Clear out your media library of images that are no longer in use
• Check for broken links and fix or remove them
• Review and archive content that’s no longer relevant to your business

In 2026, Google’s quality signals have become more sophisticated. A lean, well-maintained site consistently outperforms a bloated one for both users and search engines alike.

8. Simplify and Improve Your Navigation

Efficient navigation isn’t just better for user experience, it’s also better for the planet. When visitors can find what they need in fewer clicks, they use less data, spend less time bouncing between pages, and have a more satisfying user experience. All of this translates to lower energy consumption at scale.

Clear, logical navigation also reduces the cognitive load on users and sends positive signals to Google. It’s one of the fundamentals of sustainable web design that’s easy to overlook but has outsized impact.

• Ensure your most important pages are reachable within two clicks from the homepage
• Avoid complex mega-menus that load large amounts of HTML and CSS
• Use a clear hierarchy: main navigation, sub-navigation, and footer links should all have a logical structure
• Consider user testing or heatmap tools to identify where visitors get lost and simplify those journeys
• For larger sites, an effective internal search function can reduce wasted navigation journeys significantly

9. Audit Your Third-Party Scripts

The scripts running quietly in the background of your website are often overlooked, but every time someone visits your site, their browser also loads a queue of third-party scripts. Mid-size websites often rely on numerous third-party scripts, with typical pages frequently loading around 20 or more. These might include Google Analytics, Facebook Pixel, live chat widgets, cookie consent tools, heatmapping software, advertising trackers, and social share buttons. Each one makes additional network requests, adds to page weight, and burns energy without you even realising it’s still there. All of them slow your site down and increase its carbon footprint.

• Use Google Tag Manager’s preview mode to see every script firing on each page
• Run your URL through WebPageTest.org and check the ‘Requests’ tab to look for scripts loading from domains you don’t recognise
• Remove tracking pixels for any platform you’re no longer actively using
• Consider switching to a lightweight privacy-first analytics tool like Plausible or Fathom – they’re a fraction of the size of Google Analytics and don’t share data with advertisers
• Audit your cookie consent setup – some consent management platforms are themselves surprisingly heavy

Trimming your script load can reduce page weight, improve your privacy posture, and is increasingly expected by users who are switching on browser-level ad blockers in growing numbers.

10. Consider Your Fonts

Typography is often the last thing people think about when it comes to sustainable website design, but it can be one of the easiest wins.

Custom web fonts (like those loaded from Google Fonts) require additional HTTP requests and can add 100–400KB to your page weight, depending on how many variants you’re loading. Most sites load five or six font weights when one or two would do. Some load fonts they’re not actually using on the page at all.

• Audit how many font families and weights you’re actually using – one brand font and one system font for body copy is often enough
• If using Google Fonts, host them locally rather than loading from Google’s servers to remove an external dependency and reduce latency
• Consider using a variable font – a single font file that contains multiple weights, dramatically reducing load overhead
• For utility pages (privacy policy, FAQs, contact), consider system fonts entirely – they’re already installed on the user’s device and require zero download

Small typography choices, multiplied across thousands of monthly visits, make a measurable difference to your site’s data transfer and carbon output.

How to Measure Your Website’s Carbon Footprint

You can’t improve what you don’t measure. Before making any of the changes above, it’s worth establishing a baseline for your website’s environmental impact. Fortunately, there are free tools that make this straightforward.

Website Carbon Calculator (websitecarbon.com)

Enter your URL and get an instant estimate of how much CO₂ your site produces per page view, compared to other websites. It shows your site’s carbon rating (from A+ to F), your data transfer per visit, and how your hosting compares. It’s not perfectly precise, but it’s an excellent starting point and a benchmark you can return to after making improvements.

Ecograder (ecograder.com)

Built by Mightybytes, Ecograder gives a more detailed report which scores your site across sustainability, user experience, and performance. It pulls in real data from Google PageSpeed Insights and the Green Web Foundation’s hosting database. Importantly, it provides specific, actionable recommendations rather than just a score.

Green Web Foundation Check (thegreenwebfoundation.org)

Enter your domain and instantly check whether your hosting provider is verified as running on renewable energy. If it isn’t, that’s your clearest first action. If it is (or once you’ve switched to green hosting) you can display a verified ‘green website’ badge on your site.

At Solve, we run every site we build through these tools as part of our launch process. We also make our own green hosting credentials transparent – every site we host is powered by 100% renewable energy, and we’re verified by the Green Web Foundation.

If you’d like us to run a free carbon audit on your current website and show you where the biggest wins are, just get in touch.

What the Best Sustainable Websites are Doing in 2026

Sustainable website design is something real organisations are implementing right now, and the results are measurable.

Patagonia

The outdoor clothing brand Patagonia added a small carbon badge to their website footer showing the CO₂ cost of each page view and how they offset it. This reinforced their sustainability credentials with exactly the audience that matters most to them.

The Guardian

The Guardian reduced their digital carbon emissions by removing infinite scroll and lazy-loading their advertising and published the data publicly. Readers responded positively to the transparency, and the performance improvements benefited their SEO rankings at the same time.

Low-Tech Magazine

Perhaps the most radical example: Low-Tech Magazine runs a version of their website on a solar-powered server. When it’s cloudy, the site can go offline! They use dithered (pixel-reduced) images, system fonts, and no JavaScript. The site weighs less than 100KB per page and loads near-instantly on any connection. It’s an extreme example, but it demonstrates what’s possible when sustainability is treated as a genuine design constraint rather than an afterthought.

The UK SME Opportunity

You don’t need to be Patagonia to make sustainable website design part of your brand story. UK consumers are increasingly choosing businesses that demonstrate environmental values in action. Your website is one of the most visible things you do, and how it’s built and hosted says something about how you operate.

Displaying a green hosting badge, sharing your Website Carbon Calculator score, or simply communicating that your site runs on renewable energy are small, credible actions that differentiate you from the majority of competitors who haven’t thought about this at all.

Sustainable Website Design and the Law  

For most UK businesses, sustainable web design has been a values-driven choice, but that’s starting to change.

The CSRD (EU Corporate Sustainability Reporting Directive)

The CSRD requires many large EU companies and listed SMEs to report on environmental and social impacts under ESRS, which may include digital-related impacts where they are material. While this primarily affects larger organisations, the supply chain effect means it’s increasingly relevant to UK SMEs that supply or partner with EU-based businesses. If your client asks for your carbon data, your website’s environmental impact is part of that picture.

UK Digital Sustainability Standards

The W3C’s Sustainable Web Interest Group published updated Web Sustainability Guidelines (WSGs) in 2025, which are moving toward becoming an official W3C Note in 2026. These guidelines cover user experience design, web development, hosting, and business strategy, and are expected to become a baseline reference for UK government digital procurement and B Corp certification requirements.

What This Means Practically

You don’t need to act on regulation today, but the direction of travel is clear. Businesses that start building sustainably now will face no disruption when reporting requirements tighten. Those that leave it until it becomes mandatory will face both cost and reputational pressure.

As a certified B Corp, Solve already operates to standards that anticipate where regulation is heading. When you build with us or host with us, that accountability is built in from the foundation.

Making Sustainable Website Design Work for Your Business

Sustainable website design isn’t a trade-off. Every action in this list makes your site faster, more efficient, and better for users – as well as kinder to the planet. 

Better performance means higher Google rankings. Better user experience means lower bounce rates and higher conversions. And a clear commitment to sustainability is increasingly what your customers are looking for. If you want to understand the business case for sustainable web design, see our breakdown of the key benefits of sustainable web design here.

At Solve, sustainable website design is central to everything we build. As a B Corp certified agency powered by 100% renewable energy, we’ve helped hundreds of businesses create websites that perform brilliantly and tread lightly on the planet.

Whether you want to optimise an existing site or start a new build with sustainability at its core, we’d love to help. Do you want a free carbon audit of your site? Get in touch today and let us lead you to a brighter future for people and the planet.

Sustainable Website Design FAQs