ALTer
ALTer is a Chrome extension that detects images missing accessible descriptions and generates descriptions on demand using AI.
What ALTer is
ALTer is a Chrome extension that detects images missing accessible descriptions and generates descriptions on demand using AI. It leaves images with a proper description unchanged. Images without alt text receive an “ALT” badge; clicking one generates a description, places it in the image’s alt attribute, and makes it immediately readable by screen readers. The extension is intended to help address WCAG Success Criterion 1.1.1 on pages users visit, including pages they do not control. Users create a free account and sign in through the extension popup with an email address and password. New users receive 30 credits per month, and each image description uses one credit. The Free plan is free and includes 30 credits per month. The site directs users to add ALTer to Chrome from the Web Store. Publishing workflows are also listed.
Good
- Detects images that lack alt text
- Leaves properly described images unchanged
- Generated descriptions are injected into alt attributes
- Descriptions are immediately readable by screen readers
- Free plan includes 30 monthly credits
Watch out
- Each image description uses one credit
- Requires a free account and sign-in
- Chrome is the listed browser destination
Who it suits
ALTer suits people who want to request alt descriptions for images on pages they visit, including pages they do not control. It is relevant to users seeking screen-reader access to those descriptions.
Verdict
ALTer provides on-demand AI descriptions for images without alt text and exposes them to screen readers. The free monthly allowance is 30 credits, with one credit used per description.
Plans and prices
From ALTer's own pricing page, checked 4 Oct 2001.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | 30 credits/month · one credit per image description |
The facts
Each one read from ALTer's own pages, with the date it was checked.
What it does
- Accessibility context
- The site says ALTer helps meet WCAG Success Criterion 1.1.1 on pages users visit, including pages they do not control.checked 4 Oct 2001
- Account
- Users create a free account and sign into the extension popup with an email address and password.checked 4 Oct 2001
- Credit allowance
- New users get 30 free credits per month, with one credit used per image description.checked 4 Oct 2001
- Existing descriptions
- The extension does not touch images that already carry a proper description.checked 4 Oct 2001
- Image detection
- An “ALT” badge overlays images without alt text.checked 4 Oct 2001
- Purpose
- ALTer detects images missing accessible descriptions and generates descriptions on demand using AI.checked 4 Oct 2001
- Screen reader access
- When clicked, a generated description is injected into the image’s alt attribute and is immediately readable by screen readers.checked 4 Oct 2001
Where it runs
- Browser support
- The site says to add ALTer to Chrome from the Web Store.checked 4 Oct 2001
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