Accessibility Checker
Run quick accessibility checks on any page’s HTML
100% free. This tool needs our server to do the work, so what you submit is sent there, processed and then discarded - it is never stored.
Static HTML analysis - a full audit also needs manual keyboard and screen-reader testing.
About this tool
Run quick accessibility checks against a page's HTML, flagging common issues that make a site harder to use for people with disabilities - like missing alt text on images, poor color contrast, or missing form labels. It's a fast first-pass audit, not a full replacement for comprehensive accessibility testing.
How to use this tool
- Analyze page markupScan HTML for common WCAG-related structural and attribute issues.
- Review flagged findingsCheck missing labels, alt text, contrast, and heading/navigation problems.
- Apply accessibility fixesUpdate templates/components to address root causes, not one-off pages only.
- Retest and verify manuallyRun checker again and validate with keyboard/screen-reader walkthroughs.
The quickest accessibility fixes
Most failures come from a few repeated issues: images without alt text, form fields without labels, low colour contrast, links that say only "click here", a missing page language and buttons that do not work with the keyboard. Fixing those covers a large share of real problems.
Automated checks catch only part of WCAG. Test with the keyboard alone (Tab, Enter, Space) and with a screen reader to find the rest.
Key features
- Finds high-impact accessibility issues quickly.
- Improves usability for all users, not only assistive-tech users.
- Supports compliance readiness and audit preparation.
- Great first pass before deeper manual accessibility testing.
Common uses
- Pre-release QA for public-facing websites.
- Improving accessibility scores in procurement/compliance contexts.
- Auditing legacy pages for WCAG modernization.
- Teaching teams common accessibility anti-patterns.
Tips for better results
- Automated checks are a start; always pair with manual keyboard tests.
- Fix design-system components to eliminate repeated page issues.
- Use meaningful alt text for informative images only.
- Track recurring findings to improve content team workflows.
Mistakes to avoid
- Treating automated pass as full accessibility compliance proof.
- Adding decorative alt text that creates screen-reader noise.
- Fixing one page while reusable templates remain broken.
- Ignoring focus order and keyboard navigation behavior.
Frequently asked questions
No - automated checks catch common, detectable issues (like missing alt text or contrast problems) but can't evaluate everything accessibility requires, like whether content makes logical sense to a screen reader user or whether keyboard navigation genuinely works well. Use this as a helpful first pass, not a complete accessibility audit.
Common ones include missing image alt text, insufficient color contrast, missing form labels, and improper heading structure - the kinds of issues automated tools can reliably detect from HTML alone.
It ensures people with visual, motor, or cognitive disabilities can actually use your site, and is increasingly a legal/compliance requirement in many regions - beyond that, many accessibility fixes (like clear headings, good contrast) also improve usability for everyone.
The Web Content Accessibility Guidelines, published by the W3C. Level AA of WCAG 2.1 or 2.2 is the common target, and many laws - including the European Accessibility Act - point to it.
Add alt text to meaningful images, label every form field, make sure text has enough contrast, give links descriptive text instead of 'click here', and check the page works with the keyboard alone.
Try the one built into your system - VoiceOver on Mac and iPhone, Narrator on Windows, TalkBack on Android - or the free NVDA on Windows, and navigate the page without looking at the screen.