Alt-text generator: get image description suggestions

1. 1Log in or create a free account.
2. 2Choose a JPEG, PNG, WebP or GIF image of up to 5 MB.
3. 3Optionally describe the page context and purpose, for example “linked logo to the home page”.
4. 4Choose the language of your page and confirm that the image may be sent to the AI service.
5. 5Review the suggestion and copy an adjusted version into your CMS. For a decorative image, use alt="".

Alt text conveys the information or function that the image has in this place. Ask yourself: what would be missing without the image? The same photo can need different text on a product page and in a report. That is why the context you provide helps.

• Informative images: describe the message briefly, without “image of”.
• Linked images and buttons: name the destination or action, not the appearance.
• Images of text: reproduce the text unless it is already next to the image.
• Decorative images: set an empty alt attribute alt="", do not leave it out.
• Charts and complex graphics: name the topic in the alt text and add the values in the page text or a table.

If an image probably only decorates in the given context, such as a background pattern or a mood picture without a message, the tool shows a hint. You decide whether an image is decorative: the suggestion only helps if it does carry information after all.

The AI only sees the image and your context. It knows neither the purpose on your page nor the names of people, places or products unless you provide them, and it can misread details. Real people are not identified by their appearance. An alt-text suggestion does not certify that your website is accessible.

Suggestions are counted per account and calendar month, separately from the other AI features. An attempt where the AI service reports an error counts too. Images rejected before processing, for example because of their format or size, do not count.

For the suggestion, we send the image, your optional context and the chosen language to our AI service provider Anthropic (Claude). Accessonaut stores neither the image nor the suggestion; we only count how often your account has used the tool. Only upload images you may have processed, and no images with particularly sensitive content. Details are in the privacy policy.

The image inventory in your account lists the images of your scanned pages, distinguishes missing, existing and intentionally empty alt texts and lets you approve suggestions selectively.

• W3C WAI: An alt Decision Tree⁠

Source checked on 13 November 2026.