Stop Writing Alt Tags Manually: I Built an AI Solution That Does It in Minutes
Hey everyone,
If you manage a website (or several), you know the pain of alt tags.
They’re essential for accessibility and SEO, but writing hundreds of them manually?
Soul-crushing work.
And let’s be honest: when we DO write them, half the time they end up as generic descriptions like “image-123.jpg” that help exactly no one.
How It Actually Works
The workflow is surprisingly elegant. You feed it any URL, and it:
Scrapes the page and finds every image missing an alt tag
Extracts rich context – page titles, nearby text, headings, captions, everything around that image
Sends both the image URL and context to GPT-4o-mini – this is key: the AI actually LOOKS at the image while understanding where it appears on the page
Generates perfect alt tags following Google’s accessibility guidelines
Stores everything in a database ready for your CMS
The magic is in the context. Most alt tag generators just describe what they see. This workflow understands PURPOSE. A photo of a laptop gets described differently on a tech news site versus an e-commerce product page versus a workspace inspiration blog.
Who This Is For
This is perfect if you’re:
A developer managing multiple client sites
An SEO specialist optimizing for image search
A content manager drowning in accessibility backlog
An agency that needs to scale accessibility services
Anyone who cares about making the web more accessible
The Technical Bits
Don’t worry if you’re not an n8n expert – I walk through every single node in detail. You’ll learn:
How to scrape websites properly
JavaScript for HTML parsing (regex-based, no external libraries)
How to structure prompts for vision AI
Loop automation techniques
Database integration basics
Even if you’ve never used n8n before, you’ll have a working automation by the end.