SEO Playbook

How to create Image Alt Text for SEO

Search engines expect every visual to include thoughtful descriptions. Here is your complete playbook for boosting long-tail visibility with GPT-4o Vision.

Updated Aug 2025 β€’ 5 min read

Whether you’re shipping a new UI screen, uploading lifestyle photography, or digitizing paperwork, descriptive text helps Google, Bing, and Pinterest understand your content while keeping you compliant with WCAG.

What Algorithms Look For

πŸ‘οΈ Clarity

Describe the primary subject and action clearly.
Ex: "Analytics dashboard highlighting MRR trends"

🧠 Context

Mention why the image exists on the page.
Ex: "Hero banner for lifetime plan"

πŸ“ Conciseness

Keep alt attributes under 125 characters. Push extended details into a long-description field or caption.

πŸ”‘ Keywords

Include focus terms naturally once. Do not stuff keywords.
Ex: "ai image describer workflow"

File Naming Conventions

Search engines inspect filenames too. Don't waste this ranking opportunity.

βœ•
Bad Example
IMG_3349.PNG
βœ“
Good Example
dashboard-ui-darkmode-2025.png

Workflow with AI Image Describer

  1. 1

    Upload

    Drag or select any JPG, PNG, GIF, or PDF. Uploads are processed securely by GPT-4o Vision.

  2. 2

    Generate Copy

    Click "Generate". You receive a long description, concise alt text, and caption tailored for accessibility.

  3. 3

    Publish

    Update Shopify, Webflow, or WordPress with the generated text. Signed-in users can review logs later.

Real-World Examples

Asset TypeRecommended Alt TextCaption Idea
Pricing Bannerβ€œHero banner promoting lifetime plan for AI Image Describerβ€β€œUpgrade now and add more credits.”
Mobile UIβ€œScreenshot of mobile editor showing dark mode controlsβ€β€œEdit alt text on the go.”
Lifestyle Photoβ€œCreator using a laptop to convert screenshot to text near a windowβ€β€œConvert images to copy in seconds.”

Advanced Tips

  • β–ΈPlan localized copy: Let us know which languages you need for upcoming multilingual prompts.
  • β–ΈUse Schema: Use ImageObject structured data to reinforce the description.
  • β–ΈQuarterly audits: Filter logs for outdated descriptions and refresh them in bulk.

Ready to make your site accessible and SEO-friendly?

Generate Alt Text Now (Free)
How to create Image Alt Text for SEO | AI Image Describer