Image Alt Text Generator
Describe your image and get several accessible, SEO-ready alt text options β each one scored and ready to paste into your code.
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What Is an Image Alt Text Generator?
Alt text (short for "alternative text") is a short description attached to an image in a page's HTML using the alt attribute. Screen readers read it aloud for people who are blind or low-vision, browsers display it if the image fails to load, and search engines use it to understand what an image shows since they can't "see" pixels the way a person does. It sits in the code, invisible on the page itself, but it does real work in both accessibility and search visibility.
This tool takes a plain description of what's in your image β the subject, action, and setting β along with an optional target keyword and image type, then generates several alt text options: a straightforward descriptive version, a keyword-aware version, a shorter version for simpler images, and a format suited to the image type you selected (product, infographic, logo, or team photo). If you mark an image as purely decorative, it correctly recommends an empty alt="" instead of a description, which is what accessibility guidelines actually call for in that case.
How the Score Is Calculated
Each generated alt text is checked against four weighted factors:
| Factor | What it checks |
|---|---|
| Length | Whether the alt text stays under roughly 125 characters, the point past which most screen readers stop reading or truncate. |
| Descriptiveness | Whether the text has enough words to actually describe the image rather than being a single vague word. |
| Keyword use | Whether your target keyword appears once, naturally β not stuffed in repeatedly, which hurts both accessibility and SEO. |
| Accessibility compliance | Whether the text avoids redundant phrases like "image of" or "picture of," which screen readers already announce automatically. |
Alt Text Best Practices
Never start with "image of," "photo of," or "graphic of" β screen readers already announce that an image is present, so repeating it wastes the listener's time and adds nothing. Instead, describe what matters: "golden retriever catching a frisbee in a park," not "image of a dog."
Keep it under about 125 characters so it doesn't get cut off, and skip decorative images entirely by leaving alt="" β this tells screen readers to skip right past a purely visual element like a spacer or a background flourish instead of announcing something meaningless. Never keyword-stuff alt text purely for SEO; one natural mention of a relevant term is enough, and repeating it looks like spam to both users and search engines. For the full technical reference, see Wikipedia's entry on the alt attribute and Google's official guide to image SEO best practices.
Related Reading
Alt text usually gets written at the same time as the surrounding copy β if you're writing product pages, our ecommerce product description examples show how strong product copy and clear image descriptions work together. For general page copy, these before-and-after website copy examples are a useful reference too.
Related Tools
- Meta Description Generator β write the description that pairs with your newly optimized image.
- Headline Analyzer β score the headline on the page this image sits on.
- CTA Generator β pair a strong call to action with your visual content.
- USP Generator β sharpen the value proposition your image is supporting.
See the full list on the Free AI Writing Tools page.