The problem it solves

Alt text is one of those SEO tasks that's technically simple but brutally tedious at scale. If you have an image-heavy site — product pages, blog posts, resource pages — you'll have hundreds of images with missing or low-quality alt text.

Google uses alt text to understand images (since it can't "see" them). Missing alt text means those images contribute nothing to your rankings. Bad alt text is a wasted opportunity.

How to use it

  1. Export your image filenames from your CMS, FTP client, or a quick ls command in your assets folder
  2. Paste the prompt above into a new Claude chat
  3. Drop your filename list at the bottom
  4. Copy the output directly into your CMS or image manager

Works best when filenames are descriptive (e.g. seo-audit-checklist-screenshot.png). For completely generic names like IMG_4823.jpg, Claude will flag them as unresolvable rather than guessing.

Result

Typical output for 50 images takes Claude about 15 seconds. Each alt text comes out appropriately descriptive without keyword stuffing — exactly what Google recommends.