Image Alt Text Generator
Write alt text that helps a person, then helps a search engine.
A line of context makes the alt text specific. The image itself is not uploaded.
Your image stays in your browser. Add context for a specific result.
Default mode runs locally. A vision model is used only if one is configured.
Concise, descriptive, and context-rich versions will appear here.
What this tool does
Alt text is not a caption and it is not a keyword slot. It is the sentence a screen reader says in place of an image. Good alt text describes the image's purpose in context; bad alt text says “image” or stuffs a product name into every photo.
Upload an image, add a line about what it shows, and get three options: concise, descriptive, and SEO-aware. The tool keeps them under the length screen readers handle well and avoids the phrases that make alt text useless.
Three useful lengths
A short label, a descriptive sentence, and a slightly richer version with context.
Accessibility rules built in
No “image of,” no keyword stuffing, no duplicate of the caption.
Works for any site
Copy the text into WordPress, Shopify, Webflow, or your CMS of choice.
How to use Image Alt Text
- 1
Add the image
The image is previewed locally and never uploaded in the default mode.
- 2
Add a little context
One line about what the image shows and why it matters on the page.
- 3
Pick and copy
Choose the length that fits, then paste it into your CMS.
Example
A white ceramic pour-over coffee dripper on a wooden counter, next to a bag of beans.
Concise: White ceramic pour-over dripper on a wooden counter. Descriptive: A white ceramic pour-over coffee dripper sits on a wooden counter beside a bag of coffee beans. SEO: White ceramic pour-over coffee dripper from the AIbyNow home brewing guide, photographed on a wooden counter.
FAQ
Image Alt Text questions
What is alt text?
Alt text (alternative text) is the description a screen reader announces when an image cannot be seen. It also appears when an image fails to load. It should describe the image's content or function in context, not repeat the caption.
How long should alt text be?
Usually 5–15 words, and rarely more than 125 characters. If the image needs a longer explanation, put that in the surrounding text and use a short alt label.
When should alt text be empty?
Decorative images — spacers, background flourishes, purely visual dividers — should have empty alt text (`alt=""`) so screen readers skip them. A logo that is also a link needs alt text describing the destination, not the picture.
Does alt text help SEO?
It can help image search and accessibility, but it is not a place to stuff keywords. Describe the image honestly; the ranking benefit follows the usefulness.
Is my image uploaded?
By default the preview stays in your browser. If a vision model is configured on the server, the image may be sent for analysis; the page tells you which mode is active.