Free Alt Text Checker
Scan your website for missing or inadequate image alt text. Find WCAG 1.1.1 violations before they become accessibility complaints or lawsuits.
How Our Alt Text Checker Works
Our alt text checker scans every image on your page and evaluates whether it has meaningful alternative text. It detects missing alt attributes, empty alt text on informational images, placeholder text like "image" or "photo", file names used as alt text, and alt text that is too long or too short to be useful. Decorative images are flagged when they lack the proper empty alt attribute.
The Impact of Alt Text Checker Issues
Missing alt text is the number one accessibility issue cited in lawsuits. Screen reader users rely entirely on alt text to understand images. Without it, your content is invisible to blind and low-vision users. Over 60% of accessibility lawsuits mention missing image descriptions as a primary violation.
Issues Our Alt Text Checker Finds
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Missing alt attribute
Images with no alt attribute at all. Screen readers announce the file name instead, creating a confusing experience.
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Placeholder alt text
Alt text like "image", "photo", "IMG_4532.jpg", or "banner" that provides no meaningful information about the image content.
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Decorative images not marked
Decorative images like borders, spacers, or background flourishes that should have an empty alt="" attribute but don't.
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Alt text too long
Alt text over 125 characters that should be shortened or moved to a long description using aria-describedby.
Related WCAG Requirements
Non-text Content
All non-text content has a text alternative that serves the equivalent purpose.
How AccessGuard Fixes This
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Automatic Detection
Our scanner checks your entire site for alt text checker issues in minutes. No manual testing required.
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AI-Powered Fix Suggestions
Get the exact code changes needed to fix each issue. Copy the fix, send it to your developer, and it's done.
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Plain English Reports
Every issue explained without technical jargon. Understand what is wrong and why it matters, even without coding knowledge.
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Priority Ranking
Issues ranked by lawsuit risk so you fix the most dangerous ones first. Focus on what matters, not a 500-item checklist.
Frequently Asked Questions
What is alt text and why does it matter?
Alt text (alternative text) is a written description of an image that screen readers read aloud to blind and low-vision users. Without alt text, these users have no way to understand the content of your images. It is also required for WCAG compliance and helps with SEO.
How long should alt text be?
Alt text should be concise but descriptive - typically under 125 characters. It should convey the purpose of the image, not just describe it literally. For complex images like charts or infographics, use aria-describedby to provide a longer description.
Should every image have alt text?
Not every image. Decorative images like borders, spacers, and background elements should have an empty alt attribute (alt="") so screen readers skip them. Informational images, buttons with images, and linked images must have meaningful alt text.
Other Accessibility Checkers
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Form Accessibility Checker
Scan your forms for missing labels, poor error handling, and input barriers. Make sure every user can complete your forms, from signup to checkout.
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Link Accessibility Checker
Find vague, ambiguous, or inaccessible links on your website. Make sure screen reader users understand where every link goes.
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ARIA Accessibility Checker
Validate ARIA roles, states, and properties across your site. Catch invalid ARIA usage that confuses screen readers and assistive technology.
Check Your Site Now
Run a free accessibility scan and find alt text checker issues on your website in minutes. No credit card required.
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