How to Do a
UX Audit Checklist for Ecommerce & Websites

An e-commerce site isn't just a website. It's a store. And just like in a physical store, if the customer can't find what they're looking for in 10 seconds, they leave. The difference? Online, your competitor is one click away.

The most common UX problems in online stores: hidden shipping costs that only appear at checkout, slow loading due to unoptimized product images, search filters that don't work properly, and product pages without enough information. Each of these problems costs you sales.

A proper e-commerce UX audit examines the entire purchase funnel: from the moment the user lands on your site to the moment they complete (or abandon) their purchase. You look at category pages, product pages, cart, checkout, payment flow, and post-purchase experience. At each step, you measure how many users continue and how many leave.

Jakob Nielsen created the 10 usability heuristics in 1994, and they remain the foundation of every UX audit 30 years later. Why? Because they're based on how the human brain works, and that doesn't change with technology trends.

How it works: You go through each page and score each heuristic on a scale from 0 (complete failure) to 4 (excellent). Visibility of system status: does the user know where they are? Match between system and real world: are you using language they understand? User control and freedom: can they go back or undo an action? Consistency: are buttons, colors, and navigation the same everywhere? Error prevention: do you prevent mistakes before they happen?

A score of 0 on any heuristic means there's a critical problem that needs immediate fixing. A score below 2 on 3 or more heuristics means the site needs serious improvement before you invest in advertising or SEO. Because there's no point driving traffic to a site that doesn't convert.

A UX audit and CRO analysis aren't the same thing, but they go hand in hand. The UX audit identifies problems. CRO measures how much they cost you in sales and gives you the priority order to fix them.

Example: Your UX audit finds the checkout form has 12 fields. That's a usability problem. Through CRO analysis, you see that 68% of users abandon at checkout. If you reduce fields to 6, you estimate a 15-25% conversion increase. Now you know exactly how much money you're losing and can calculate the ROI of the fix.

The tools you need: Google Analytics 4 for funnel analysis, heatmaps (Hotjar or EyeCaptain AI) for visual behavior, session recordings for qualitative insights, and A/B testing (Google Optimize or VWO) to confirm your changes work. Don't make changes without measuring results.

In most markets, over 65% of web traffic comes from mobile devices. If you're not doing a mobile UX audit, you're losing the majority of your users. And being "responsive" isn't enough. It needs to be designed for mobile.

What to check on mobile: Touch target size (minimum 44x44 pixels per WCAG guidelines). Thumb zone: the most important elements should be easily reachable with the thumb. Loading speed on 3G/4G connections. Font sizes (minimum 16px for body text). Forms optimized for mobile keyboards (email, phone, numeric fields).

Common mistake: Many people test their mobile site only in the Chrome simulator. That's not enough. The simulator doesn't show real speed, doesn't properly emulate touch events, and doesn't reflect the real-world experience. Test on a real phone, on a real network.

15-20% of the global population lives with some form of disability. That means if you ignore accessibility, you're excluding one in five potential customers. And it's not just an ethical issue. It's a legal compliance matter (European Accessibility Act) and, of course, a revenue issue.

The basic accessibility checks in a UX audit: Color contrast (minimum 4.5:1 contrast ratio for normal text). Alt text on all images. Keyboard navigation on all interactive elements. ARIA labels on forms. Proper heading hierarchy (H1 → H2 → H3). Visible focus indicators. Run axe DevTools or WAVE tool for automated testing, but also do manual testing.

AI tools don't replace the UX expert. But they do something equally important: they automate the time-consuming parts of the audit, so the expert (or you) can focus on strategy. Traditional eye-tracking required a lab, 20+ participants, and weeks of analysis. Today, AI attention prediction gives reliable results in seconds.

Tools like EyeCaptain use deep learning models trained on millions of real eye-tracking data points. You upload a screenshot or URL, and get a heatmap, fixation map, gaze plot, and attention score in less than a minute. This shows you if your CTA is visible, if users see your value propositions, and if the visual hierarchy works as designed.

Other AI applications in UX auditing: automated competitor website analysis, predictive analytics for conversion optimization, NLP analysis of user reviews and support tickets, automated accessibility scanning, and content analysis for readability scores. Combining these tools with human judgment gives the best results.

Google uses Core Web Vitals as a ranking factor. That means a slow site doesn't just lose users due to poor experience, it also loses organic traffic. Triple hit: fewer visitors, worse experience, fewer conversions.

The three core metrics: LCP (Largest Contentful Paint) measures when the main content loads. Target under 2.5 seconds. INP (Interaction to Next Paint) measures how fast the page responds to clicks or taps. Target under 200ms. CLS (Cumulative Layout Shift) measures how much elements jump around as the page loads. Target under 0.1.

Quick wins for improvement: Compress images to WebP format. Use lazy loading for images below the fold. Preload critical fonts. Remove unused JavaScript. Use a CDN. Especially on many websites, excessive third-party scripts (chat widgets, analytics, social plugins) are often the main reason for slow loading. Measure before and after each change.