UX Audit Checklist: A Step-by-Step Guide to a Better UX
What is a UX audit, and when should you run one?
A UX audit is a systematic review of how people use a website or app, aimed at finding the problems that stop them from finishing tasks. A UX audit combines usage data, expert review against known standards and, where possible, observation of real users.
Run a UX audit before a redesign, after a drop in conversions or leads, when support requests keep repeating the same question, or at least once a year on a site that earns revenue. An audit before a redesign is the most valuable, because it tells you what to keep as well as what to change.
The DesignFXPro rule for audits: no finding goes on the fix list without a severity score and a metric it should move. That keeps the audit tied to revenue, not opinion.
The 8-step UX audit checklist
The UX audit checklist below runs in order, because each step feeds the next. Steps 1 and 2 stop you from judging the site on taste, and step 8 turns findings into a plan.
- Define the goal: pick one or two business outcomes (leads, sales, sign-ups) and the user tasks that lead to them, and record today's baseline numbers.
- Gather data: review analytics funnels, top exit pages, on-site search terms, session recordings or heatmaps, support tickets and any survey feedback.
- Check navigation and information architecture: can a new visitor find your top three tasks from the homepage, and do menu labels use your customers' words?
- Review usability against Nielsen's 10 heuristics, with three to five reviewers working independently.
- Test accessibility and mobile: run WCAG 2.2 AA checks, use the site on a real phone, and try key tasks with a keyboard only.
- Review content and microcopy: headings, button labels, form hints and error messages should say exactly what happens next.
- Audit performance: measure Core Web Vitals for key templates on mobile and desktop.
- Prioritize: score every issue for severity, estimate effort, and build a fix list that starts with high severity, low effort items.
Which usability heuristics should a UX audit check?
A UX audit should check Jakob Nielsen's 10 usability heuristics, the most widely used rules of thumb for interface design. Nielsen developed them with Rolf Molich in 1990 and refined them in 1994 (NN/g, 10 Usability Heuristics).
| Heuristic | What to check on your site |
|---|---|
| Visibility of system status | Do forms, carts and uploads show loading and success states? |
| Match between the system and the real world | Do labels use customer language rather than internal jargon? |
| User control and freedom | Can users undo, go back or cancel without losing their work? |
| Consistency and standards | Do the same actions look and behave the same on every page? |
| Error prevention | Do forms stop mistakes before submission, for example with input formats and clear required fields? |
| Recognition rather than recall | Are options visible, or must users remember them from a previous screen? |
| Flexibility and efficiency of use | Are there shortcuts for returning users, such as saved details or quick reorder? |
| Aesthetic and minimalist design | Does each page focus on one main message and action? |
| Help users recognize, diagnose, and recover from errors | Do error messages explain the problem and how to fix it in plain words? |
| Help and documentation | Can users find answers to common questions without contacting support? |
Use more than one reviewer. Nielsen Norman Group advises that ideally three to five people evaluate the same interface independently, because every individual misses some issues (NN/g, How to Conduct a Heuristic Evaluation). Merge the lists only after each reviewer has finished.
How do you audit accessibility and mobile UX?
Audit accessibility against WCAG 2.2 level AA and audit mobile UX on real phones, not only a resized desktop browser. These two checks catch a large share of the problems that automated reports and desktop reviews miss.
Accessibility failures are common. The WebAIM Million 2026 report found detectable WCAG 2 failures on 95.9% of the top million home pages. The most frequent were low contrast text (83.9%), missing image alt text (53.1%), missing form input labels (51%) and empty links (46.3%).
- Contrast: normal text needs at least 4.5:1 under WCAG 2.2 success criterion 1.4.3.
- Targets: buttons and links need at least 24 by 24 CSS pixels under success criterion 2.5.8, or enough spacing.
- Labels: every form field needs a visible, programmatic label, not just placeholder text.
- Keyboard: every task should be possible with Tab, Enter and Escape, with a visible focus outline.
- Alt text: every meaningful image needs a short text alternative.
Mobile matters for both users and search. StatCounter's data for September 2026 puts mobile at 58.99% of worldwide web traffic, and Google uses the mobile version of a site's content for indexing and ranking (Google Search Central).
How do you audit page speed as part of UX?
Audit page speed with Google's Core Web Vitals, measured at the 75th percentile of page loads on mobile and desktop. A page passes when it meets all three thresholds at that percentile (web.dev, Web Vitals).
- Largest Contentful Paint (LCP), loading: 2.5 seconds or less.
- Interaction to Next Paint (INP), responsiveness: 200 milliseconds or less.
- Cumulative Layout Shift (CLS), visual stability: 0.1 or less.
Check templates rather than single pages: the homepage, a service or product page, a blog post, and the form or checkout. Use field data from PageSpeed Insights where available, and Lighthouse for lab testing while you fix issues. Our website speed optimization guide covers the usual fixes.
How do you prioritize UX audit findings?
Prioritize UX audit findings by severity first and effort second. Nielsen's severity scale rates each problem from 0 (not a problem) to 4 (usability catastrophe) based on frequency, impact and persistence (NN/g, Severity Ratings).
| Rating | Meaning | Action |
|---|---|---|
| 4 | Usability catastrophe | Fix before anything else ships |
| 3 | Major problem | Fix in the next sprint or release |
| 2 | Minor problem | Schedule with related work |
| 1 | Cosmetic only | Fix if time allows |
| 0 | Not a usability problem | Remove from the list |
Then plot each issue on an impact and effort grid. Quick wins with severity 3 or 4 go first, larger structural fixes get scoped as projects, and cosmetic issues wait. Attach the baseline metric from step 1 to each fix so you can see whether it worked.
Common mistakes in a UX audit
The most common UX audit mistake is producing a long list of issues with no severity, owner or metric attached. These are the other mistakes we see most often.
- Starting without a goal, so the audit becomes a list of personal preferences.
- Relying on one automated tool and treating its score as the audit.
- Using a single reviewer instead of three to five independent evaluators.
- Checking only desktop, or only a resized browser instead of real phones.
- Reviewing pages in isolation rather than complete tasks such as booking or checkout.
- Skipping the re-measure, so nobody knows whether the fixes moved the numbers.
How DesignFXPro runs a UX audit
DesignFXPro runs UX audits as the Discover stage of our four-step process: Discover, Strategize, Execute and Optimize. We audit your analytics, competitors and key user journeys, then deliver a ranked fix list with the metric each fix should move.
Our UI/UX design services handle the redesign work, and our conversion rate optimization services test the fixes once they are live. For Omeida Chinese Academy, mobile page load time fell from 6.8 seconds to 2.0 seconds and monthly course enrollments rose from about 32 to 124 over the engagement (Omeida case study); results vary by site and audience.
If your audit points to bigger problems, our guide to common UX mistakes explains the fixes, and our article on usability testing sample sizes shows how to confirm them with real users.
Frequently asked questions
How long does a UX audit take?
What tools do you need for a UX audit?
What is the difference between a UX audit and usability testing?
Usability testing finds problems experts did not predict and shows how serious they are. The strongest approach is an audit first, then a small usability test to confirm the biggest findings.
How often should you do a UX audit?
Can I do a UX audit myself?
The limit is bias: people who know a site well stop seeing its problems. Ask several people who have never used the site to try the main tasks, and note every hesitation.