Free AI Alt Text Generator
Generate SEO-friendly and accessible alt text for your images. Improve image search rankings and make your website more accessible.
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Alt Text: Accessibility First, Rankings Second
Alt text is the written description of an image that screen readers speak aloud to visually impaired visitors and that search engines read to understand what an image shows. It is a legal accessibility requirement in a growing number of jurisdictions, and it is the primary signal behind Google Images — a search surface that drives billions of visits and that most sites ignore entirely.
Good alt text is harder than it looks. It must describe the image accurately and concisely (under about 125 characters, because screen readers may cut off longer descriptions), include a relevant keyword without being stuffed, and reflect why the image is on that page — the same screenshot needs different alt text on a features page than in a tutorial.
This generator turns a plain-language description of your image into five polished alt text options that balance accessibility and SEO. Use different variants for the same image in different contexts rather than repeating one string everywhere.
How to Generate Alt Text
Describe the image
Write what the image shows in your own words — objects, actions, context. Mention the page topic so the keyword can be worked in naturally.
Pick from five variants
Each option stays under 125 characters and takes a slightly different angle: more literal, more contextual, more keyword-forward.
Add it to the alt attribute
Paste into the alt="" attribute of your <img> tag or the alt text field of your CMS media library.
Alt Text Best Practices
Describe function, not just appearance
For a button screenshot, "Submit button on the checkout form" beats "blue rectangle". Context makes alt text useful to both users and crawlers.
Skip "image of" and "picture of"
Screen readers already announce it as an image. Those words waste your character budget twice.
Empty alt for decorative images
Backgrounds, dividers, and flourishes should carry alt="" so screen readers skip them. Decorative images with keyword-stuffed alt text are a spam signal.
One keyword, naturally placed
Include your target term when the image genuinely relates to it. Repeating keywords across every image alt on a page looks manipulative.
Pair alt text with descriptive filenames
"kanban-board-dark-mode.png" reinforces "Kanban board in dark mode" alt text. Together they give Google Images a consistent story.
Frequently Asked Questions
Everything you need to know about alt text generator.
Alt text (alternative text) is an HTML attribute that describes the content of an image. It serves two critical purposes: it makes images accessible to visually impaired users using screen readers, and it helps search engines understand what your images contain for image search rankings.
Alt text is a key factor in image SEO. Google uses alt text to understand image content and context. Well-optimized alt text helps your images appear in Google Image Search results, driving additional organic traffic to your website.
Good alt text is descriptive, concise (under 125 characters), and naturally includes relevant keywords without stuffing. It should accurately describe the image content while providing context about why the image is on that particular page.
Decorative images (like background patterns or dividers) should have empty alt attributes (alt=""). This tells screen readers to skip them. Only meaningful images that add content value should have descriptive alt text.
Alt text is hidden in the HTML and read by screen readers and search engines. Captions are visible text displayed below an image. Both are valuable for SEO, but alt text is specifically designed for accessibility and image search optimization.
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