UI and UX are two of the most frequently confused terms in web design. They're used almost interchangeably in job postings, client briefs, and agency pitches – but they're not the same thing. Here's a clear way to think about them.
UX – the experience
User Experience (UX) is about how a person feels while using a website or product. Can they find what they're looking for? Is the flow logical? Do they arrive at the contact form without frustration? UX is about the structure, the flow, and whether the overall experience makes sense.
UI – the interface
User Interface (UI) is everything the user sees and touches: buttons, colours, typography, icons, spacing, visual hierarchy. It's the visual layer that makes a product look polished, clear, and inviting.
Why you need both
Good UI without good UX: a beautiful site where you can't figure out how to contact the business. Good UX without good UI: a perfectly logical flow that looks amateurish and erodes trust before the visitor reads a word. The best sites nail both – the experience makes sense, and the visual layer makes it appealing.
In practice for a business site
UX decisions: how many sections, what order, where the CTA goes, what the form looks like, how the navigation is structured. UI decisions: which fonts, what colour palette, button styles, spacing, how images are presented. On most small business sites, one person handles both – which is exactly why site quality varies so much.