A paid, credit-based alt text generator with deep CMS integrations.
A paid, credit-based alt text generator with deep CMS integrations.
| Alta | AltText.ai | |
|---|---|---|
| Category | Standalone alt text generator | Standalone alt text tool |
| Price | Free (5 images/day) or $29 one-time/year for Pro | From $5/mo (25 free credits to start, no card required); credit packs from $3 |
| Strength | No recurring subscription — generate free without signup, Pro is a one-time yearly fee instead of ongoing credit purchases, and complex images (charts, infographics) come back with a long description and an HTML data table, not just a short alt. | Native WordPress and Shopify apps that automatically tag every new image on upload — no manual copy-paste — plus 130+ language and integration support. |
You manage a large WordPress or Shopify catalog and want alt text applied automatically to every new upload without touching it yourself.
You want a quick, free way to generate WCAG-compliant alt text for individual images or small batches without recurring credit costs.
AltText.ai is the more mature product for hands-off, at-scale automation via its CMS apps. Alta doesn't yet offer automatic CMS integration — you copy and paste the result.
Source: AltText.ai Pricing
Per the W3C's Complex Images guidance, a chart needs a short alt and a long description. Alta writes both — plus an HTML data table of the values it reads off the chart.
The usual complaint about AI alt text is that it describes pixels instead of purpose. Tell Alta what the page is about and it writes to the image's function.
If a label was too small or a value ambiguous, Alta says so instead of inventing it — so your human review goes to the images that need it.
The European Accessibility Act applies since June 2025, and 2026 is the first full year of national supervision — with corrective-action notices already landing.
Google Images drives ~20% of web searches, and AI answer engines lean on alt text to understand what your visuals show.
2.2 billion people live with visual impairment. Alt text makes your content usable for everyone.
Paste a URL into the free checker — it grades every image on the page, then fixes them one click at a time.
Run the free alt text checker →Yes — output is kept under 125 characters, avoids "image of" prefixes, and describes function and content per WCAG 2.2 SC 1.1.1. Complex images additionally get the long description the W3C asks for.
It detects them and returns three things: a short alt for the alt attribute, a long description that transcribes the labels, units and figures, and an HTML data table of the values. Copy the ready-to-paste <figure> snippet and the whole thing is wired up with aria-describedby.
Yes — every AI alt text tool needs a human pass, and Alta is built to make that pass short: it flags what it could not read reliably instead of guessing, and it tells you when an image looks decorative and should get alt="".
No. Images are processed in memory and never stored.
Buy once on Gumroad, paste your license key in the tool. Instant activation, works in any browser.