Alt text generator for nonprofits, schools and museums
AltTextLab accurately describes your whole media library in one run, then keeps up as your team publishes.
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Trusted by university web teams, museums and community nonprofits
The mission is bigger than the team
Decades of archive
Hand-writing doesn't scale
Uploads outpace editors
Works where you publish
CMS integrations
WordPress
Developer Tools
Clear the backlog, then stay on top of it
Install AltTextLab on your site
Add the plugin for your CMS and connect your account. Before it generates anything, AltTextLab shows you how many images are missing alt text, so you know the size of the job and what it costs.
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Describe the library, then check what matters
Run bulk generation across your whole media library. Every description is yours to review from the generation history. Anything your team wrote by hand stays untouched, unless you switch the regeneration on deliberately.
New uploads are covered automatically
From then on, images are described as they're uploaded. Nothing to remember, nothing to schedule, no backlog building up behind you.
Cover every image on the site in one pass
What web teams say
Can AltTextLab handle several thousand images?
Yes. Bulk generation runs across your whole media library rather than image by image, and large libraries keep processing in the background.
What happens to the alt text our team already wrote?
Nothing. By default AltTextLab only fills images where alt text is empty or missing, so anything written by a describer, curator or editor stays exactly as it is. You can regenerate everything, but you have to switch that on deliberately.
Can we review descriptions before they go live?
Yes. Every description appears in the generation history, where it can be reviewed, edited or replaced — before or after publishing. For collections where wording matters, this is where a describer's judgement goes.
Our site isn't public. Can it still work?
On Drupal, yes. The module sends images directly rather than fetching them from a public URL, so it works on intranets, staging environments and sites behind a login. On other platforms, ask us before you sign up and we'll tell you honestly whether it will work.
Does this make our website ADA or WCAG compliant?
No, and no tool honestly can. WCAG 2.1 AA covers contrast, keyboard access, structure, forms and much more. What AltTextLab does is close one of the most common failures — missing image descriptions — across your whole site, in a form an auditor can verify.
Is there a nonprofit or education discount?
There's no separate discount program. Instead the free plan is permanent — 25 images a month, no card — and paid plans start at $5/month, with credits that roll over and never expire. If you have an unusually large archive, get in touch and we'll work something out.
We run several department sites. Do we pay for each one?
No. One account covers every domain your organisation runs, and credits are shared across all of them.
Can I pay once for a big archive job instead of subscribing?
Yes. Alongside the monthly plans there are one-off credit packs, so you can buy exactly enough credits to clear the archive in one run and stop there, with no subscription and nothing recurring to renew. One credit describes one image, and credits you've bought never expire, so a job spread over a few weeks isn't a problem.
How does it handle sensitive or archival imagery?
Carefully, and with you in control. AltTextLab describes what's visible in an image; it doesn't guess at identity, ethnicity or circumstances it can't see. Every alt textlands in the generation history for you to review, which is where a describer who knows the collection should have the final say. By default, anything your team wrote by hand is left untouched; regenerating existing descriptions is possible, but only if you turn it on deliberately. And your images aren't kept: they're processed to produce the description and then discarded, never stored and never used to train AI models.
See your images described in seconds
