AI Image Alt Text Generator
Polish your description of an image into clear, accessible WCAG-compliant alt text.
Quick answer: AI Image Alt Text Generator: polish your description of an image into clear, accessible WCAG-compliant alt text. Runs on our servers, files deleted within minutes, free, no signup.
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It is worth being precise about what this tool does: it polishes your written description into accessible alt text — it does not analyze the pixels of an image file. You supply what the image shows and its role on the page, and the AI tightens the wording into the concise, screen-reader-friendly phrasing that accessibility guidelines call for.
Good alt text describes the function of an image in context, not just its contents, and skips filler like "image of" because screen readers already announce that it is an image. The same photograph might warrant "CEO Jane Smith" on a leadership page and "attendee taking notes during the keynote" on an event recap — context is why the tool asks for it.
A subtlety many people miss: purely decorative images should use an empty alt="" attribute so assistive technology skips them entirely, rather than being handed a description of a spacer or flourish. Aim for under about 125 characters, since many screen readers truncate beyond that. When the surrounding copy needs the same clarity treatment, the AI summarizer is a natural companion.
Frequently asked questions
- Does this look at the actual image file?
- No — this tool polishes <em>your</em> description into accessible alt text. It doesn't analyse pixels. You provide the visual content; AI handles the wording.
- What's good alt text?
- Concise, descriptive, no 'image of' filler, and conveys the same information a sighted user would get. For decorative images, use empty alt (<code>alt=""</code>) so screen readers skip them.
- Why does context matter?
- Alt text should describe the image's role on the page, not just its content. The same photo of a person might be 'CEO Jane Smith' on a bio page or 'Conference attendee taking notes' on an event recap.
- Where does my description go?
- POSTed to our server, forwarded to OpenAI in memory. Not retained for training and not logged.
- Why under 125 characters?
- Most screen readers stop reading alt text at around 125–250 characters. Concise alt is also better for SEO because it's more focused.