What's the difference between missing and empty alt text?

Missing alt text means no alt attribute exists in the IMG tag, which is an error. Empty alt text (alt='') is intentionally blank for decorative images and is correct usage.

How long should alt text be for SEO?

Optimal alt text length is 5-125 characters. It should be descriptive enough for context but concise enough for screen readers and search engine processing.

Should I include keywords in image alt text?

Yes, but naturally. Include relevant keywords that describe the image content, but avoid keyword stuffing which can harm both SEO and accessibility.

How often should I check my images for alt text issues?

Run alt text audits monthly for active websites, after major content updates, and before launching new pages to maintain consistent image SEO and accessibility.

Do background images need alt text?

Background images defined in CSS don't use alt attributes. If background images convey important information, consider adding descriptive text in the HTML content instead.

Image Alt Text Checker - Free Online SEO Tool

An Image Alt Text Checker is a comprehensive SEO audit tool that scans any webpage to identify images missing alt text or containing poor-quality alt attributes. This essential accessibility and SEO tool helps webmasters ensure their images are properly optimized for search engines and screen readers, improving both search rankings and user experience.

Comprehensive Image SEO Analysis

The checker analyzes every image on a specified URL, detecting missing alt attributes, empty alt text, and overly generic descriptions. It categorizes findings into critical issues (missing alt text), warnings (poor quality alt text), and compliant images with proper descriptions. The tool examines IMG tags, background images, and embedded media to provide a complete image accessibility audit. Results include image URLs, current alt text status, and specific recommendations for improvement.

SEO and Accessibility Best Practices

Proper alt text optimization serves dual purposes: helping search engines understand image content for better rankings in Google Images, and providing essential accessibility for visually impaired users. The tool identifies when alt text is too short, too long, or contains keyword stuffing. Best practices include writing descriptive alt text between 5-125 characters, incorporating relevant keywords naturally, and using empty alt="" for purely decorative images. The checker flags common mistakes like using "image of" or "picture of" prefixes that add no value.

Technical Implementation Guidance

Beyond identifying issues, the alt text checker provides actionable insights for implementation. It distinguishes between missing alt attributes (technical errors) and intentionally empty alt text (proper for decorative images). The tool helps prioritize fixes by highlighting images that contribute most to SEO value, such as product images, infographics, and content-related visuals. Regular auditing ensures ongoing compliance with accessibility standards and maintains optimal image SEO performance across your entire website.

Image Alt Text Checker - Free Online SEO Tool