mages play a big role in how your website looks, loads, and performs. But if they’re not properly optimised, they can slow down your site, hurt your SEO, and frustrate visitors.
Whether you’re running a business website, blog, or online store, image optimisation is one of the easiest ways to improve user experience and search rankings — without needing a developer.
Here’s how to do it right.
1. Choose the Right File Format
Not all images are created equal. Using the correct file format can make a huge difference in both quality and file size.
For most modern websites, WebP is the best choice — supported by all major browsers and significantly smaller than traditional formats.
2. Compress Before You Upload
Uploading high-res images directly from your phone or camera is a performance killer. Compress images using tools like:
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Built-in compression in platforms like WordPress via plugins (Smush, ShortPixel)
Aim for the smallest file size that still looks sharp — ideally under 200KB for hero images and 50–100KB for smaller visuals.
3. Resize Images to Match Display Needs
Don’t upload 4000px-wide images if your site only displays them at 1200px. Resizing images to the exact dimensions they’ll appear on screen reduces unnecessary load and keeps your layout consistent.
Bonus: Pre-sized images reduce the work your browser has to do during page load.
4. Add Descriptive ALT Attributes
ALT text helps with accessibility and SEO. Describe what the image shows in a natural, keyword-aware way.
For example:
“Screenshot of SEO dashboard showing keyword rankings in Nottingham”
ALT attributes are also what screen readers use, so they’re essential for an inclusive website.
5. Use Lazy Loading
Lazy loading means images only load as users scroll down — not all at once when the page first opens. This dramatically improves initial load speed, especially on mobile.
Most modern websites and themes include this by default, or it can be added via plugin.
6. Track Performance with Google Analytics
Image optimisation isn’t a set-and-forget task. Use tools like Google PageSpeed Insights, Lighthouse, or even Google Analytics to monitor load speeds and user behaviour.
If your bounce rate is high or certain pages are slow to load, unoptimised images could be part of the problem.
Final Thought: Optimise for People, Not Just Google
While performance and SEO matter, don’t forget your visitors. Your images should still look great, tell a story, and support your message.
An optimised website is fast, user-friendly, and visually appealing — and that starts with the images you use.
Need Help Optimising Your Website?
At NPW Digital, we build fast, image-optimised websites that perform across all devices. Whether you’re in Nottingham or nationwide, we can help speed up your site and improve your SEO.
