Image Alt Tag Checker
Scan any webpage for images missing alt text. Improve accessibility and SEO in seconds.
What This Tool Checks
Complete image accessibility audit for any webpage.
Missing Alt Detection
Finds every image that lacks an alt attribute, which is essential for screen readers and search engine image indexing.
Decorative Image Check
Identifies images marked as decorative (alt="") so you can verify they truly don't convey meaningful content.
Coverage Report
Shows the percentage of images with proper alt text and a visual progress bar for quick assessment.
Smart Filtering
Filter images by status (all, missing alt, has alt) to quickly focus on the ones that need attention.
Attribute Details
Shows image dimensions, loading attribute, and full src path to give you complete context for each image.
How It Works
Three steps to audit any page's image alt text.
Enter URL
Paste the URL of the page you want to scan. Any publicly accessible webpage is supported.
Scan Images
We fetch the page HTML and extract every <img> tag, analyzing alt attributes, dimensions, and loading behavior.
Review Report
See the alt text coverage score, filter by status, and fix missing alt text based on our recommendations.
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Frequently Asked Questions
Common questions about image alt text and accessibility.
Why is alt text important for images?
Alt text serves two critical purposes: accessibility and SEO. Screen readers read alt text aloud so visually impaired users understand the image content. Search engines also use alt text to understand and index images, which can drive traffic through image search results. Missing alt text is a WCAG 2.1 Level A violation.
What is the difference between missing alt and alt=""?
An image with no alt attribute at all (missing) is an accessibility error because screen readers don't know what the image represents. An image with alt="" (empty string) intentionally marks the image as decorative, telling screen readers to skip it. Use alt="" only for purely decorative images like borders or spacers.
How should I write good alt text?
Good alt text is concise (under 125 characters), descriptive, and contextual. Describe what the image shows, not what it is (say 'Golden retriever catching a frisbee' instead of 'Photo of a dog'). Avoid starting with 'Image of' or 'Picture of' since screen readers already announce it as an image.
Does alt text affect my search engine rankings?
Yes. Alt text is a confirmed ranking factor for Google Image Search. It also provides context to search engines about the surrounding content, which can help with overall page relevance. Pages with proper alt text tend to rank better because they signal quality content and good technical SEO practices.