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.
46.5% of the Tranco top 5,000 websites fail on skipped heading level alone.Read our studyCheck Your Accessibility
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Open Accessibility CheckerAccessibility Error Guides
Click any error for a detailed explanation, code examples, and step-by-step fix instructions.
Missing Alt Text on Images
Missing alt text hides images from screen readers and Google Images. Learn why alt attributes matter for accessibility and SEO, and how to write them well.
Missing Form Labels
Missing form labels leave inputs unreadable to screen readers and hurt usability. Learn how to label every form field correctly for WCAG compliance, step by step.
Empty Heading Elements
An empty heading breaks your document outline and confuses screen reader navigation. Learn how to find and fix empty H1 to H6 elements for accessible structure.
Skipped Heading Levels
A skipped heading level, like jumping H1 to H3, breaks your document hierarchy. Learn how to order headings correctly for screen readers and stronger SEO.
Missing Language Attribute
A missing lang attribute on the html element breaks screen reader pronunciation and weakens SEO. Learn how to set the right language code correctly in seconds.
Low Color Contrast
Low color contrast makes text hard to read for many users and fails WCAG AA. Learn the required contrast ratios and how to fix failing text and backgrounds fast.
Missing Button Type Attribute
A missing button type attribute defaults to submit, causing accidental form submissions and data loss. Learn how to set the right button type every time.
Missing ARIA Labels on Interactive Elements
Without an aria-label, icon buttons and image links are invisible to screen readers. Learn when and how to use aria-label and aria-labelledby correctly.
Auto-Playing Audio or Video
Auto-playing media with sound disrupts screen readers and frustrates visitors. Learn the WCAG autoplay rules and how to handle audio and video playback well.
Missing Table Headers
Missing table headers leave screen reader users hearing values with no context. Learn how to add th cells and scope attributes to make data tables accessible.
Link With No Accessible Text
Icon-only links and empty anchors announce as "link" and nothing else. Learn the four ways to give a link accessible text without changing your design.
Button With No Accessible Text
A button holding only an icon announces as "button" with no purpose. Learn how to label close, menu and search buttons without changing how they look.
iframe Without an Accessible Name
An iframe with no title announces as just "frame" to a screen reader. Learn the three ways to name one, when aria-label is the better choice, and what to do with ad frames.