30x-seo-images

Audit image alt text, formats, sizes, lazy loading, and CLS impact.

46|12|Updated Mar 8, 2026
One-click install
npx skills add https://github.com/norahe0304-art/30x-seo --skill 30x-seo-images
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: 30x-seo-images
Source: https://github.com/norahe0304-art/30x-seo/tree/main/skills/30x-seo-images
Command: npx skills add https://github.com/norahe0304-art/30x-seo --skill 30x-seo-images

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Image optimization often requires manual audits to ensure alt text, sizes, formats, and lazy loading are correct, which wastes time and hurts performance. This skill automates checks and guidance to improve SEO and user experience.

Core Features & Use Cases

  • Alt text validation: ensures all images have descriptive alt text.
  • Size and format analysis: recommends best formats (WebP/AVIF) and target sizes; checks responsive images and lazy loading.
  • CLS prevention and performance guidance: helps minimize layout shifts and improve Core Web Vitals.
  • Use Case: Run this on a new article to audit every image and generate an optimization plan.

Quick Start

Analyze the images on your current page to identify optimization opportunities and produce an actionable report.

Frequently Asked Questions about 30x-seo-images

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I check if all images on a web page have proper alt text for SEO?

To check if images have proper alt text for SEO, you can run an automated image optimization analysis that validates the presence and descriptiveness of alt text across your pages, generating an actionable report for any missing attributes.

What's the best way to audit image sizes and formats like WebP for better page performance?

The best way to audit image sizes and formats is to use an automated analyzer that reviews your images against recommended formats like WebP and AVIF, checks size thresholds, and provides targeted optimization guidance.

How does lazy loading affect Cumulative Layout Shift (CLS) and Core Web Vitals?

Lazy loading affects CLS by potentially causing content to shift as images load, but an image optimization analysis can identify missing CLS prevention patterns and provide guidance to minimize layout shifts and improve Core Web Vitals.

Can I automatically generate an image optimization plan for a new blog article?

Yes, you can automatically generate an image optimization plan for a new blog article by running an audit that checks alt text, image sizes, formats, responsive srcset usage, and lazy loading rules to produce actionable recommendations.

Does image optimization analysis check responsive srcset usage across CMS-driven content?

Yes, image optimization analysis applies to CMS-driven content workflows and implements specific checks for responsive srcset usage, ensuring images are correctly served across different device widths.

Why do I need to convert images to WebP or AVIF formats for SEO?

You need to convert images to WebP or AVIF formats for SEO because these modern formats reduce file sizes significantly, which improves page load speeds and performance metrics that search engines use for ranking.