Alt Text Generator
Write better alt text for your images. Choose an image and tell the tool what it does on the page – informative, a link or button, decorative, or an image of text – plus optional context. When the site owner has configured an AI vision model, the generator suggests a short alt text, a more detailed version and, for complex images, a longer description. Whether or not AI is available, the checker reviews any alt text you write: length, “image of” openings, file names, generic words and, for linked images, whether it describes the destination.
- Encrypted connection
- No sign-up
- Free to use
The image is reduced to at most 1024 pixels in your browser and sent once to the site’s AI service to describe it. It is not stored. AI descriptions can be wrong – always review them.
How to use Alt Text Generator
- Choose an image and its purpose.
- Add context about the page.
- Generate suggestions (if available) or write your own.
- Review the checks and copy the HTML.
Alt Text Generator features
Purpose-aware
Informative, functional, decorative, text.
Three lengths
Short, detailed and long description.
Alt text review
Works without AI.
Languages
Nine languages.
Small upload
Image reduced to 1024 px in your browser.
Honest setup
Says when AI is not configured.
When to use Alt Text Generator
- Product photos in shops.
- Blog and news images.
- Charts and infographics.
- Bulk content clean-up.
Alt Text Generator FAQ
Is the image stored?
No. It is reduced in your browser, sent once to the AI service and deleted afterwards.
Should decorative images have alt text?
No – use alt="" so screen readers skip them.
Can AI alt text be trusted?
It is a starting point. Check accuracy and context; never let it guess who people are.
How long should alt text be?
Usually under 125 characters; longer descriptions belong in the page text.
Describe the purpose, not just the pixels
The same photo needs different alt text on a product page, in a news article or as a link. Context decides what matters.
How it works: a URL is fetched once by our server through a guarded client that only connects to public addresses; the HTML (and, where needed, the stylesheets) is then analysed in your browser as inert text – scripts on the page never run. Pasted HTML is analysed without any request. Nothing is stored.
Automated testing has limits: tools can reliably find missing names, invalid ARIA, broken references, skipped headings and similar code problems, but roughly two thirds of WCAG criteria need human judgement – whether alt text is meaningful, whether focus order makes sense, whether content is understandable. Every result says what still needs manual testing.
The checks follow WCAG 2.2 and WAI-ARIA 1.2, the standards behind the European Accessibility Act, the Americans with Disabilities Act guidance, Section 508 and EN 301 549. Each finding names the success criterion so you can look it up and include it in a report or ticket.
Related tools on this site cover the rest of an accessibility review: the HTML accessibility checker, WCAG contrast checker, accessibility colour analyzer, keyboard navigation checker, ARIA validator, alt text generator, heading structure checker and the accessibility statement generator.
Who it is for: front-end developers checking a release, designers reviewing a component library, content editors, QA testers and agencies preparing accessibility audits for clients. No account, plugin or installation is needed.