How to write alt text with
AI Image Describer
Turn product shots and UI mockups into accessible copy within seconds. Automate your SEO workflow with GPT-4o.
"Image descriptions do a lot of heavy lifting. They help visually impaired visitors understand what is on the screen, give search engines context, and boost conversions."
In this guide, we walk through an automated workflow using AI Image Describer—the GPT-4o Vision workflow built for SaaS marketers, ecommerce stores, and creative agencies.
Why Alt Text Matters
Accessibility
Screen readers rely on alt attributes. Leaving them blank creates a poor experience for thousands of users.
SEO Boost
Keywords sprinkled naturally in alt text help Google Images and Pinterest understand your content.
Compliance
Meet WCAG 2.1 and ADA regulations. Automating the process lowers your legal risk.
Generate Copy in 4 Steps
Upload your file
Drag or select your product photo, UI screenshot, or infographic. We support JPG, PNG, GIF, JFIF, and PDF.
Check the preview
Confirm the thumbnail and file name before generating copy to ensure accuracy.
Click "Generate description"
The browser sends it to GPT‑4o Vision. You get three fields: a long description, alt text, and caption.
Copy or tweak
Paste into your CMS. Signed-in users can revisit recent runs in the dashboard usage log.
Best Practices Cheat Sheet
| Scenario | Recommendation |
|---|---|
| Product shot | Mention the item, angle, color, and purpose. |
| UI screenshot | Describe the layout, key widgets, and CTA labels. |
| Lifestyle image | Highlight the subject, mood, and action. |
| Promo graphic | Explain the offer, deadline, and supporting icons. |
Example Output
📸 Sustainable running shoes on a wooden floor with morning sunlight.
"Pair of sustainable running shoes next to a reusable bottle under morning light."
"Lace up eco-friendly runners built for daily commutes. 🌿👟"
Details the recycled mesh fabric, the warm sunlight, and the positioning near the window.
When to regenerate?
- ✓ You updated a colorway, UI layout, or hero banner.
- ✓ You translated the page into another language.
- ✓ You want to A/B test alt text for SEO.
With AI Image Describer, alt text creation is no longer a tedious chore.
Start Describing Images for Free