Free Accessibility & SEO Tool
AI Alt Text Generator
SEO-friendly alt text and image descriptions that boost accessibility and image search ranking.
How to use the Alt Text Generator
Accessible and searchable, in seconds.
1
Upload the image
Use the exact image you'll publish. Alt text should describe what's actually in the picture.
2
Add page context (optional)
The topic of the page helps the AI pick relevant keywords for image search.
3
Paste into your CMS
Add the alt text to the image in WordPress, Shopify or your site builder. Screen readers and Google Images both use it.
Alt Text Generator — FAQ
Why is alt text important?
It makes images accessible to screen-reader users and helps Google understand your images for Image Search. Good alt text serves both.
How long should alt text be?
Under 125 characters — the generated alt text follows this limit. The longer description is for accessibility extras if your CMS supports it.
Can I use it for product photos?
Yes — it describes the product clearly, which helps in marketplaces and on product pages.
Is the image stored?
No — the image is sent to the Gemini Vision API for analysis and discarded. PromptHub never stores your uploads.