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Image SEO Auditor
Paste a URL. We fetch the page, extract every image, run 7 structural checks and return a 0 to 100 image SEO score with the exact fix per failing check. Per-image breakdown table included. No signup.
FAQ
Frequently Asked Questions
What does the image SEO auditor check?
Seven structural checks: alt text coverage (missing attribute versus empty versus descriptive), file size (flags images over 200 KB), width and height attributes (prevents Cumulative Layout Shift), lazy loading, descriptive filenames (flags IMG_1234 style), image origin, and HTTP status. Each returns pass, warn or fail with the specific finding and the exact fix. Per-image breakdown table shows every image with its individual flags.
Why does image SEO matter?
Images drive page weight more than any other asset. Oversized images tank Core Web Vitals which Google ranks on. Missing alt text makes images invisible to AI assistants, screen readers, and Google Image Search. Missing dimensions guarantee layout shift. Descriptive filenames are a weak but real ranking signal. The combined effect across every image on every page is substantial.
Is this really free?
Yes. The full report shows on screen with no signup. Rate-limited to 10 audits per IP per day. Optional email field sends you a copy of the report.
How many images do you sample?
Up to 50 images per page. Each image gets a HEAD request to measure its actual file size, so you see real byte counts not estimates. Pages with more than 50 images are sampled from the top of the page down.
What counts as a descriptive filename?
A filename that describes what the image contains: red-nike-running-shoe-side.jpg not IMG_4832.jpg. We flag common non-descriptive patterns (IMG_1234, DSC01234, image1, Screen Shot, unnamed, untitled, pure numeric names, and hash-looking strings).
Will Middle Mann fix the images for me?
Yes. The full AI SEO and GEO service covers image optimization as part of the broader rebuild. Alt text rewrites, bulk resizing and reformatting to WebP, filename cleanup, lazy-loading installation. See the AI SEO service page for details.
About the Tool
What this tool does.
An image SEO auditor scores every image on a page across the 7 structural signals Google, AI assistants and screen readers use to understand what the image is and how fast it loads.
Images are the heaviest asset on most pages and the single biggest SEO signal nobody optimizes. Alt text makes images readable to AI assistants and screen readers. File size determines Core Web Vitals (which Google ranks on). Width and height prevent layout shift (also a Core Web Vital). Lazy loading cuts initial page weight. Descriptive filenames help Google Image Search and give AI assistants a semantic hint when alt text is weak. This tool scores all seven at once and shows you exactly which images on your page need which fix.
All data comes from real HTTP fetches. We parse the page HTML with a strict DOM parser, extract every img tag (including lazy-loading data-src variants), fire parallel HEAD requests to measure actual file sizes in bytes, and cross-check origins and filenames against descriptive-naming patterns. Zero AI, zero scraping, zero estimation. Fix the fails, re-run, watch the score climb.
7 checks + per-image table.
Real HTTP fetches. Per-image byte counts.
- Alt Text Coverage25%
- File Size20%
- Width + Height15%
- Descriptive Filenames15%
- Lazy Loading10%
- HTTP Status10%
- Image Origin5%
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Try another SEO tool.
Most Middle Mann SEO tools are free, no signup, no email required. We offer paid SEO tools too. Both are self-service and rate-limited. Need higher volume, deeper reporting or something custom? Get ahold of us.
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