Free Tool

Image SEO Auditor

Audit images across your pages for missing alt text, oversized files, legacy formats, and other SEO issues. Check up to 20 URLs at once.

Detects missing and empty alt attributes on images
Flags alt text exceeding 125 characters
Checks for missing width and height attributes
Identifies images over 200 KB via HEAD requests
Flags legacy formats (JPG, PNG, GIF) not using WebP/AVIF
Bulk audit up to 20 URLs — no signup required

How It Works

1

Enter your URLs

Paste up to 20 page URLs, one per line.

2

We scan every image

Our engine extracts all <img> tags and checks alt text, dimensions, file size, and format.

3

Review & fix

See issues per page and per image with actionable badges.

Frequently Asked Questions

Why does alt text matter for SEO?

Alt text helps search engines understand image content. Missing alt text means lost ranking potential in Google Image Search and reduced accessibility.

What is an oversized image?

We flag images larger than 200 KB. Large images slow page load, hurt Core Web Vitals scores, and can negatively impact rankings.

Why should I use WebP or AVIF instead of JPG/PNG?

Modern formats like WebP and AVIF offer 25-50% smaller file sizes at the same visual quality, improving page speed and user experience.

How many images per page are checked for file size?

We perform HEAD requests on up to 10 images per page to check file size without downloading the full image.

Need help optimizing your images?

Our team specializes in technical SEO and image optimization for e-commerce stores. We can help you fix every issue.

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Free Image SEO Auditor - Alt Text & File Size Checker | EcomSEO