Free Alt Text Checker
Instantly audit your website's image accessibility and SEO. Find missing alt attributes that could be hurting your search visibility.
The Role of Alt Text in Image SEO
Alt text (alternative text) serves two critical purposes: it helps search engines understand what an image depicts for indexing, and it ensures accessibility for visually impaired users. Without it, your images are invisible to Google's crawlers.
Recommended guides
Use these guides to fix the issues you found and improve your SEO performance.
Why Use Our Alt Text Audit Tool?
Nuwtonic's Alt Text Checker provides a comprehensive view of your image metadata. We don't just find missing tags; we identify empty attributes and duplicate descriptions that can confuse search engines and screen readers.
What is an Alt Text Checker?
An alt text checker is a specialized SEO tool that crawls a webpage to analyze the '<'img'>' tags. It reports on whether the 'alt' attribute is present, if it contains text, and if that text is unique across the page.
How to Audit Your Image Alt Text
Enter a page URL or paste your HTML markup.
Run the check to scan all images on the page.
Review the report for missing or empty alt values.
Update your code or CMS with descriptive, keyword-rich alt text.
Understanding Your Audit Results
Alt text present
The image includes a non-empty alt attribute, which is good for SEO.
Missing alt text
The '<'img'>' tag lacks an alt attribute entirely. This should be fixed immediately.
Empty alt text
The alt attribute exists but is blank. This is only acceptable for decorative images.
Duplicate alt text
Multiple images use the same description, which reduces SEO clarity.
Alt Text SEO FAQ
How long should alt text be?
Keep it descriptive but concise. Most SEO experts recommend under 125 characters, as screen readers may stop reading after that.
Should I use keywords in alt text?
Yes, but avoid keyword stuffing. Describe the image naturally and include your target keyword if it's relevant to the visual.
Do decorative images need alt text?
Purely decorative images should have an empty alt attribute (alt="") to tell screen readers to skip them.
Does alt text help Google Image search rankings?
Absolutely. Alt text is the primary way Google understands image content, making it essential for ranking in image search results.
What happens if I don't have alt text?
You miss out on image SEO traffic, and your site becomes less accessible, which can negatively impact your overall search reputation.
How do I fix missing alt text in WordPress?
You can add alt text through the Media Library or directly in the block editor for each image you place on a page.
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