To assess your website design and UX, look at five pillars: responsive design (how it adapts to mobile), web accessibility (contrast, font size), visual consistency (colours, typography), usability (navigation, calls to action) and perceived performance (how fast it feels). A free design audit tool gives you that diagnosis in seconds, with no technical skills needed.
94% of first impressions online come down to design. A visitor takes 50 milliseconds to form an opinion of your site, before reading a single word. Poor UX drives away the customers your SEO and your advertising worked hard to attract.
This guide explains which criteria to measure, how to improve them without starting over, and what the audit reveals again and again on small business sites.
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Does UX design have a direct effect on conversions and search rankings?
UX design has a direct, measurable effect on conversions: a good user experience can multiply your conversion rate by 2 to 4 (Forrester Research). Google also builds UX signals into its ranking criteria, so responsive design, web accessibility and visual stability (CLS) all influence your position in search results.
What usability affects directly:
Across the 150+ sites we have built at ConvertiLab, sites scoring above 75/100 on design convert on average 2,3 times better than those below 50/100, with identical traffic. Put another way: doubling your traffic or doubling your conversion rate gives you the same number of leads, but one of them often costs nothing at all.
How does a free UX design audit work in 3 steps?
A free UX design audit works by automatically analysing your page across five areas: responsive design, web accessibility, visual consistency, usability and perceived performance. The result is a design score out of 100, with your weak points ranked by priority and a suggested fix for each one.
Step 1: Enter your site URL
Go to the Design Score tool, paste the address of your homepage (or any inner page) and start the analysis.
Step 2: The multi-criteria analysis
The tool examines responsive design at several screen sizes, WCAG 2.1 accessibility (minimum contrast 4,5:1, tap targets of at least 44px), visual consistency (palette, typefaces, spacing), usability (navigation structure, placement of calls to action, heading hierarchy) and perceived performance.
Step 3: Score and prioritised recommendations
You get an overall design score out of 100 broken down by category, and for each weak point an explanation of the problem plus a concrete fix.
What exactly does the design audit assess?
The design audit assesses five categories of criteria that together define the quality of a website's user experience. Each category feeds the final score and has its own sub-criteria that can be measured objectively.
| Category | What is checked | Impact on conversions |
|---|---|---|
| Responsive design | Display on mobile, tablet, desktop | Very high (60%+ of traffic is mobile) |
| Web accessibility | Contrast, alt text, font size, keyboard navigation | High (SEO and inclusion) |
| Visual consistency | Palette, typefaces, spacing | Medium (credibility) |
| Usability | Navigation, calls to action, heading hierarchy | Very high (direct conversion rate) |
| Perceived performance | Perceived speed, animations, loading | High (bounce rate) |
Paid tools such as Hotjar (heatmaps) or Crazy Egg (session recordings) add useful behavioural data, but for a quick structural diagnosis the free tool identifies the blockers that matter most.
The most common design mistakes on small business sites
Having audited more than 200 small business sites, here are the problems that come up again and again:
1. No tappable phone number on mobile
The number is shown as text but is not a tel:// link, so the visitor has to write it down and then dial it. On mobile, that friction costs 30 to 50% of potential calls.
2. A call to action lost in the page
The "Request a quote" button sits at the bottom of the page, in the same colour as the background. On mobile, the visitor never sees it. The fix: a fixed call-to-action button at the top (sticky header), or repeated every 3 sections.
3. Text too small on mobile
16px is the absolute minimum for body text. Plenty of sites use 13px or 14px, which becomes unreadable on mobile without zooming.
4. A form that is too long
A quote form asking for 10 fields (including "budget" and "deadline") before any first contact is intimidating and sends people away. Start with 3 fields (first name, email, phone), and handle the rest in conversation.
5. Generic stock photos
People in suits shaking hands, computers floating in a blue sky: these images shout "not authentic" and destroy trust. Replace them with your own real photos, even imperfect ones.
Frequently asked questions about UX design audits
My site looks great, is that enough to convert well?
No, a good-looking design does not guarantee a good conversion rate. The audit judges the whole user experience: a beautiful site that is unreadable on mobile, has no visible call to action or has confusing menus will score poorly on design and convert poorly too. The most attractive sites are not always the best performers commercially.
What is the difference between a design audit and an SEO audit?
A design audit assesses the interface and the browsing experience (usability, responsive layout, accessibility, calls to action), while an SEO audit assesses visibility on Google (tags, content, links, technical performance). The two complement each other and feed into each other: good UX improves the behavioural signals Google reads, and good SEO brings the traffic that good UX converts.
How can you improve your design score quickly without a full rebuild?
To improve your design score quickly, start with accessibility errors (poor contrast, body text that is too small) and responsive problems on mobile. These fixes are usually quick to make in a CMS and have an immediate effect on conversions. Then check that every page has a single, clearly visible primary call to action. A quick action plan for a WordPress or Wix site: 1. Raise the font size to at least 16px if it is below that 2. Check the contrast of your body text against its background (minimum ratio 4.5:1, using the free WebAIM Contrast Checker) 3. Make the phone number tappable at the top of every page: replace the plain text with an href="tel:+33XXXXXXXXX" link in the HTML 4. Cut the contact form down to 3 fields maximum 5. Replace stock photos with your own real photos, or Unsplash images from your sector
What is the difference between a design audit and a conversion audit?
A design audit assesses the interface (usability, accessibility, responsive layout), while a conversion audit looks at the customer journey and the friction points that stop visitors becoming leads or customers. The two are connected: bad design creates friction, and friction reduces conversions. For a business owner, start with the free design audit, as it usually uncovers 80% of the most obvious conversion problems.
How long do design fixes take to improve conversions?
Design fixes affect conversions almost immediately. Making a phone number tappable or enlarging a call-to-action button on mobile can increase enquiries within 24 to 48 hours. Deeper changes (reworking the navigation structure, rewriting your conversion copy) take 2 to 6 weeks to show up in your statistics. A practical priority: if you only do one thing this week, check that your phone number is tappable on mobile and that your "Get in touch" button is visible without scrolling. Those two fixes alone have sometimes doubled the number of calls our clients received the following week. !Design audit results - conversion score before and after fixes Run a UX design audit on your site →
