Common Accessibility Errors & How to Fix Them
Learn about the most frequent WCAG violations developers make and how to fix them. Use our accessibility checker to audit your own pages.
Check Your Accessibility
Paste HTML or enter a URL to check for accessibility issues instantly.
Open Accessibility CheckerCloudways · Managed Cloud Hosting
Build accessible sites, then deploy on Cloudways managed cloud (AWS, GCP, DigitalOcean). 20% off 3 months with code VALIDATEHTML.
Accessibility Error Guides
Click any error for a detailed explanation, code examples, and step-by-step fix instructions.
Missing Alt Text on Images
Learn why alt text is required on images, how it affects accessibility and SEO, and how to write effective alt attributes.
Missing Form Labels
Form inputs without labels are inaccessible to screen readers. Learn how to properly label form fields for WCAG compliance.
Empty Heading Elements
Empty heading tags break document structure and confuse screen readers. Learn how to fix empty H1-H6 elements.
Skipped Heading Levels
Jumping from H1 to H3 breaks the document hierarchy. Learn how to structure headings correctly for screen readers and SEO.
Missing Language Attribute
The lang attribute on the html element is required for screen readers and SEO. Learn how to set it correctly.
Low Color Contrast
Text with insufficient contrast against its background is hard to read. Learn WCAG contrast requirements and how to fix them.
Missing Button Type Attribute
Buttons without a type attribute default to 'submit', which can cause unexpected form submissions. Learn how to fix this.
Missing ARIA Labels on Interactive Elements
Interactive elements without accessible names are invisible to screen readers. Learn when and how to use aria-label and aria-labelledby.
Auto-Playing Audio or Video
Auto-playing audio and video disrupts screen readers and annoys users. Learn how to handle media playback accessibly.
Missing Table Headers
Data tables without header cells are unreadable for screen readers. Learn how to make HTML tables accessible.