Website Accessibility Checkers Compared
An accessible website is easier for everyone to use, including customers with visual, hearing, motor or cognitive disabilities, older visitors and anyone browsing on a phone in bright sunlight. Accessibility checkers help you find problems quickly, but each one does a slightly different job. This guide compares WAVE, axe DevTools, Lighthouse and Siteimprove, and shows you how to pair them with a few simple manual checks.
Key takeaways
- WAVE is a quick, visual way for non-developers to spot problems on a single page.
- axe DevTools and Lighthouse run inside the browser and suit people comfortable with developer tools.
- Siteimprove scans whole websites over time, which suits larger sites and teams.
- Automated checkers find only part of the problem, so add simple keyboard and screen reader checks.
- Fix the pages customers use most first: home, contact, booking, product and checkout.
Many small business owners assume accessibility is a big-company concern. In reality, a missing label on your booking form or a low-contrast "Buy now" button can quietly turn customers away every day. Someone using a screen reader cannot book an appointment if the form fields have no names. Someone who navigates with a keyboard cannot check out if the menu only opens with a mouse.
The good news is that you do not need to be a developer to start. Free tools can show you the most common problems in minutes, and many fixes are as simple as writing alt text or changing a color. Early April, with the first quarter behind you and spring campaigns sending new visitors to your site, is a good time to run a check.
Why accessibility matters for small businesses
There are three good reasons to care about accessibility, and only one of them is legal.
- More customers. People with disabilities, and the friends and family who shop with them, are customers too. If your site does not work for them, they will buy elsewhere.
- Better usability for everyone. Clear headings, readable text and well-labeled forms make every visit smoother, including on phones.
- Legal expectations. Laws such as the Americans with Disabilities Act in the US, the Equality Act 2010 in the UK and the European Accessibility Act in the EU are often discussed in connection with websites. How they apply depends on your business, location and customers, and the rules continue to develop.
The Web Content Accessibility Guidelines (WCAG) are the widely used technical standard that most checkers test against. This article is general information, not legal advice. If you are unsure what applies to your business, check official guidance and speak to a qualified professional.
Pro tip
Start with your five most important pages, not your whole site. Your home page, contact page, main product or service page, booking form and checkout cover most customer journeys, and fixing them first gives you the biggest improvement for the least effort.
The four checkers compared
These tools are widely used and range from free browser tools to paid platforms. Features and pricing change over time, so check each provider's current features, pricing and privacy policy before relying on one.
WAVE
WAVE, from the nonprofit WebAIM, shows accessibility problems directly on top of your page using icons. You can see exactly where an image is missing alt text, where contrast is too low or where a form field lacks a label. It is available as a website and as a browser extension.
Strengths
- Very visual and beginner friendly
- Great for business owners and content editors
- Explains each issue in plain language
Limitations
- Checks one page at a time
- The icons can feel busy on complex pages
- Pages behind a login may need the extension rather than the website
axe DevTools
axe DevTools is a browser extension built on the axe accessibility testing engine. It runs inside your browser's developer tools and lists issues with clear explanations and guidance on how to fix them. Developers often use it while building or changing a site.
Strengths
- Detailed results that point to the exact code
- Designed to keep false alarms low
- Useful for checking changes before they go live
Limitations
- Less approachable if you have never opened developer tools
- Some guided features sit on paid plans
- Checks pages one at a time in the free version
Lighthouse
Lighthouse is a free auditing tool from Google that is built into the Chrome browser's developer tools. It reports on performance, SEO, best practices and accessibility, and gives each area a score. The accessibility section flags common problems such as missing labels and contrast issues.
Strengths
- Free and already in Chrome, with nothing to install
- Shows accessibility next to speed and SEO in one report
- Handy for a quick health check of key pages
Limitations
- Runs fewer accessibility checks than dedicated tools
- A high score can create false confidence
- Results can vary slightly between runs
Siteimprove
Siteimprove is a paid platform that scans entire websites on a schedule and tracks accessibility, content quality and SEO over time. It suits organizations with many pages, several editors or formal reporting needs.
Strengths
- Scans the whole site, not just one page
- Tracks progress and assigns issues to people
- Useful dashboards for managers and stakeholders
Limitations
- Usually more than a small brochure site needs
- Requires setup and ongoing ownership
- A paid commitment, so check current plans carefully
Common mistake
Treating a perfect automated score as proof that your site is accessible. Checkers are good at spotting missing alt text or poor contrast, but they cannot tell whether your alt text makes sense, whether your page order is logical or whether a screen reader user can actually complete a booking. Always add manual checks.
A simple accessibility testing routine
Combine one automated tool with a few manual checks and you will catch most of the problems that matter. Here is a routine you can run on each key page in about 20 to 30 minutes.
- Run an automated check. Use WAVE or Lighthouse on the page and note every error.
- Try the keyboard only. Put your mouse aside and press Tab to move through the page. Can you reach every link, button and form field? Can you always see where you are?
- Check images. Every meaningful image needs alt text that describes what it shows or does. Decorative images can have empty alt text so screen readers skip them.
- Check headings. Make sure the page has a clear heading structure that follows a logical order, so people using assistive technology can jump between sections.
- Check forms. Every field needs a visible label, and error messages should explain what went wrong in words, not just with a red border.
- Zoom in. Zoom your browser to 200 percent and check that text still fits and nothing overlaps.
- Listen once. Turn on the screen reader built into your computer or phone and try one key task, such as sending a contact form.
- Log and fix. Record each issue, decide who fixes it and test again afterward.
An accessibility issue log template
Track what you find in a simple table. The rows below are made-up examples for a hypothetical bakery website.
| Page | Issue | Found by | Priority | Owner | Status |
|---|---|---|---|---|---|
| Order form | Date field has no visible label | WAVE | High | Web designer | Fixed, retested |
| Home page | Light gray text on white banner fails contrast | Lighthouse | Medium | Owner | In progress |
| Menu page | Dropdown menu cannot be opened with the keyboard | Manual keyboard test | High | Web designer | To do |
Treat anything that stops someone completing a purchase, booking or inquiry as high priority.
Hypothetical example
Leila runs a yoga studio with an online booking page. She ran WAVE on her five key pages and found missing alt text on class photos, two unlabeled form fields and a low-contrast "Book now" button. Then she tried booking a class using only her keyboard and got stuck on a pop-up she could not close. Her web designer fixed the pop-up and the form labels in an afternoon, Leila rewrote the alt text herself and they agreed to rerun the check every quarter.
Fixes you can make without a developer
Plenty of improvements are within reach of anyone who can edit their own website or online shop.
- Write useful alt text. Describe what matters in the image, such as "Chocolate layer cake with fresh raspberries on a white plate".
- Use real headings. Use your site builder's heading styles instead of just making text bigger and bold.
- Make links descriptive. Replace "Click here" with "See our spring class schedule".
- Improve contrast. Use dark text on a light background, and avoid putting text over busy photos.
- Add captions to videos. Many video platforms let you add or edit captions.
- Write in plain language. Short sentences and clear instructions help everyone, including people with cognitive disabilities or those reading in a second language.
- Check documents. Menus or price lists posted as images or scanned PDFs are hard to read with assistive technology, so publish them as web text where you can.
For bigger issues, such as custom menus, pop-ups or checkout flows, work with your web designer or developer, and ask whether your website theme or platform has known accessibility limits.
Your accessibility checker action plan
- List your five most important pages
- Run WAVE or Lighthouse on each one
- Test each page using only the keyboard
- Review alt text, headings and form labels
- Zoom to 200 percent and check the layout
- Try one key task with a screen reader
- Record issues in a simple log with owners and priorities
- Fix anything that blocks a booking, purchase or inquiry first
- Consider axe DevTools or Siteimprove if your site or team is growing
- Set a quarterly reminder to check again
Frequently asked questions
Which accessibility checker should a small business start with?
WAVE is a friendly starting point for non-developers because it shows issues right on the page. Lighthouse is a good quick check if you already use Chrome. If you work with a developer, ask them to use axe DevTools when they change your site.
Are accessibility overlay widgets a quick fix?
Be cautious. Some products promise to make a site accessible by adding a widget or toolbar, but many accessibility specialists and users say they do not fix underlying problems and can even get in the way. Fixing the content and code itself is the reliable route.
How often should I check my website?
Check your key pages whenever you redesign, add a new form or launch a major campaign, and run a light review every quarter. Each time you add images or new pages, write good alt text and use proper headings as you go.
Do I need an accessibility statement?
It depends on where you operate and what kind of organization you are, so check the official guidance for your location. Even when it is not required, a short statement explaining your commitment and how people can report problems or ask for help is a thoughtful, customer-friendly step.
Related reading
The bottom line
Accessibility checkers make it easy to find the most common problems on your website. WAVE suits beginners, axe DevTools and Lighthouse suit people comfortable with browser developer tools, and Siteimprove suits larger sites that need ongoing monitoring. None of them replaces a quick keyboard test and a few minutes with a screen reader.
Pick your five most important pages this week, run one checker and try the keyboard test. Fix anything that stops a customer from booking, buying or getting in touch, and you will have a website that welcomes more people and works better for everyone.
