Free ADA Compliance Scanner: Check Your Website for Accessibility Issues
A free ADA compliance scanner can identify the violations most likely to appear in a demand letter: missing alt text, unlabeled forms, empty links, missing page language, and broken heading structure. Here is how to use one effectively.
Free ADA compliance scanners identify the accessibility violations that automated tools can detect reliably. These are also the violations that serial plaintiffs' attorneys scan for when selecting targets. Fixing them is the highest-leverage starting point for any website.
What Automated Scanners Check
Automated accessibility scanners check for issues with clear, verifiable pass/fail states. OnePageAudit checks:
Missing Image Alt Text (WCAG 1.1.1)
Images without analt attribute are invisible to screen readers. A user who is blind navigating your page with a screen reader hears nothing where the image is. This is one of the most common violations and one of the most commonly cited in demand letters.
What the scanner finds: ![]()
elements with no alt attribute.
What it cannot check automatically: Whether existing alt text is actually descriptive (e.g., alt="image" or alt="photo1.jpg" technically passes automated detection but fails WCAG 1.1.1).
Missing Form Labels (WCAG 1.3.1, 4.1.2)
Form inputs without associated labels are unusable by screen reader users. When a screen reader encounters an unlabeled text field, it cannot tell the user what information belongs there. What the scanner finds:, , and elements with no associated , aria-label, or aria-labelledby.
What it cannot check automatically: Whether label text is actually descriptive.
Missing Page Language (WCAG 3.1.1)
Screen readers need the page language declared in the HTML to select the correct pronunciation engine. Without it, text-to-speech reads your content with the wrong language rules, which can make it completely unintelligible. What the scanner finds: elements without a lang attribute.
Missing Page Title (WCAG 2.4.2)
Screen readers announce the page title when a page loads. It is the first orientation cue users get. Missing or generic titles (like "Untitled") fail this criterion. What the scanner finds: Missing elements or empty title elements.
Empty Links and Buttons (WCAG 2.4.4, 4.1.2)
Links and buttons with no accessible name cannot be understood by screen reader users. The screen reader may announce "link" or "button" with no context about where it goes or what it does. What the scanner finds: elements with no text content, no aria-label, and no image with alt text. elements with no accessible name.
Missing Skip Navigation (WCAG 2.4.1)
Keyboard users must Tab through every navigation link on every page load unless a skip link is provided. Without it, reaching the main content on a page with a 20-item navigation requires 20+ Tab presses. What the scanner finds: No "Skip to main content" or equivalent link as the first or early focusable element.Heading Structure Issues (WCAG 1.3.1)
Screen reader users navigate pages by jumping between headings, which functions like a table of contents. Missing, skipped, or out-of-order headings break this navigation pattern. What the scanner finds: No on the page, more than one , or heading levels that skip (e.g., directly followed by ).
Missing Viewport Meta Tag
Absence of the viewport meta tag prevents mobile browsers from rendering the page at the correct scale. Users who rely on mobile zoom for low vision cannot zoom in properly.Autoplaying Media (WCAG 1.4.2)
Audio that plays automatically without user control is disorienting for screen reader users and those with cognitive disabilities.What Automated Scanners Cannot Check
This is equally important to understand:
- Alt text quality: Whether existing alt text accurately describes the image
- Color contrast: Requires rendering the page with actual colors (some tools include this, some do not)
- Keyboard navigation flow: Whether all interactive elements are reachable and operable by keyboard
- Custom widget behavior: Whether dropdowns, modals, date pickers, and carousels work with keyboard and screen readers
- Form error handling: Whether error messages are programmatically associated with fields
- Meaningful link text: Whether "click here" or "read more" links are understandable in context
For these, manual testing is required. Run the automated scan first, fix everything it finds, then do keyboard and screen reader testing.
How to Use OnePageAudit's Free Scanner
- Go to onepageaudit.com
- Enter your website URL (homepage, checkout page, or contact form — wherever violations are most likely)
- Get your compliance score and full violation list in under 60 seconds
Results show each violation by type, the specific element that failed, and the WCAG criterion it maps to. A paid full report ($19) adds detailed fix instructions for every issue.
After Your Scan
Zero violations on the free scan: Your site passes automated checks. Next step is keyboard testing (Tab through the full page) and a quick screen reader check with NVDA or VoiceOver. Violations found: Prioritize in this order:- Missing alt text on informative images
- Unlabeled form inputs (especially on contact forms and checkout)
- Empty links or buttons
- Missing page language
- Heading structure issues
- Missing skip navigation
These are the violations most commonly cited in demand letters. Fix them and rescan to confirm.
Related reading:Frequently Asked Questions
What does a free ADA compliance scanner check?⌄
How accurate are free ADA compliance scanners?⌄
Is passing a free ADA scan enough to avoid a lawsuit?⌄
Do I need to create an account to scan my website?⌄
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