Image SEO Audit | Free Online Image Alt & Size Checker Tool

 Image SEO Audit – Free Online Image Alt & Size Checker Tool

Images are a critical part of modern websites, but if they are not properly optimized, they can hurt both SEO and user experience.
Search engines rely on image attributes like alt text to understand content, while users expect images to load fast and display correctly.

That’s why we built the Image SEO Audit – a free online tool to analyze all images on any webpage and highlight common SEO issues.

Why Image SEO Is Important

Alt Attributes

  • Provide context for search engines and screen readers.

  • Improve accessibility for visually impaired users.

  • Help images rank in Google Image Search.

File Size Optimization

  • Large images slow down page speed.

  • Optimized images improve Core Web Vitals (LCP, INP).

  • Faster sites rank better and convert more visitors.

Proper Dimensions

  • Missing width and height causes layout shifts (CLS issues).

  • Specified dimensions improve stability and load experience.

Key Features of Image SEO Audit

🔍 Detect Missing Alt Text

  • Instantly find all <img> tags without alt attributes.

  • Ensure your content is accessible and SEO-friendly.

📊 File Size & HTTP Status

  • Report image file sizes (KB, MB).

  • Highlight oversized images for optimization.

  • Detect broken images (404, 500).

⚡ Quick Visual Preview

  • See small thumbnails for every image.

  • Easily identify which images need fixing.

📐 Width & Height Check

  • Verify if width and height are defined.

  • Reduce layout shifts for a smoother UX.

Example: How It Works

Suppose you enter:

https://example.com/blog/post

👉 The tool will scan all images and return:

/images/hero-banner.jpg
Alt: “SEO tips banner”
Size: 420 KB
Dimensions: 1200×600

Status: ✅ 200 OK
/images/icon.png
Alt: Missing ⚠️
Size: 15 KB
Dimensions: ?×?

Status: ✅ 200 OK
/images/old-graphic.gif
Alt: “Outdated chart”
Size: 2.4 MB 🚨
Dimensions: 800×800
Status: ✅ 200 OK

With this report, you can instantly spot missing alt text, oversized files, and broken images.

When to Use This Tool?

  • Before publishing content → ensure all images have alt attributes.

  • During SEO audits → detect oversized or broken images.

  • For accessibility checks → confirm compliance with web standards.

  • To optimize page speed → identify heavy images that slow down loading.

Conclusion

The Image SEO Audit is a simple but powerful tool for anyone who manages a website.
It helps you:

  • Improve SEO visibility.

  • Optimize images for performance.

  • Enhance accessibility and user experience.

👉 Try the tool today and make sure your website’s images are fully optimized for both search engines and users!