Alta

Spec sheet

What it does

Alta generates screen-reader-ready alt text from uploaded images and offers a checker that scans a page for alt text issues.Read 9 Oct 2026 · alttext-ai.com

Accessibility output

Alta says its alt text is kept under 125 characters and follows WCAG 2.2 SC 1.1.1; it also says human review is still needed.Read 9 Oct 2026 · alttext-ai.com

Charts and infographics

For charts and infographics, Alta can return short alt text, a long description, and an HTML data table.Read 9 Oct 2026 · alttext-ai.com

Context-aware output

Users can provide page context so Alta can describe an image according to its function on the page.Read 9 Oct 2026 · alttext-ai.com

Image input limits

The upload accepts PNG, JPEG, WebP, and GIF images up to 4 MB each.Read 9 Oct 2026 · alttext-ai.com

Image privacy

Alta says images are processed in memory and never stored.Read 9 Oct 2026 · alttext-ai.com

Page checker

The free checker scans page HTML for missing, generic, duplicated, or overly long alt text, among other issues; generating fixes uses the daily quota or a Pro license.Read 9 Oct 2026 · alttext-ai.com

Shopify workflow

For Shopify, users generate alt text in Alta and paste it into each product image's ALT field, or bulk-process a catalog with Pro.Read 9 Oct 2026 · alttext-ai.com

Uncertain results

Alta says it flags labels or values it cannot read reliably instead of guessing, and can identify images that appear decorative.Read 9 Oct 2026 · alttext-ai.com

WordPress workflow

For WordPress, users paste generated alt text into an image's Alternative Text field in the media library.Read 9 Oct 2026 · alttext-ai.com

Plans and prices

Every Alta plan and price →

Where Specifiction places it

• AI Alt Text Generators#13 of 277.9