Alta
What it is
Alta is a web tool that generates screen-reader-ready alt text from uploaded images and checks pages for accessibility issues. Users can provide page context so descriptions reflect an image’s role. For charts and infographics, Alta can return short alt text, a longer description, and an HTML data table. It flags labels or values it cannot read reliably instead of guessing, and can identify decorative-looking images. PNG, JPEG, WebP, and GIF uploads are accepted up to 4 MB each. Alta says output stays under 125 characters and follows WCAG 2.2 SC 1.1.1, while human review remains necessary. Images are processed in memory and not stored. The checker scans for missing, generic, duplicated, or overly long alt text. The free plan is free and includes five images daily, unlimited scans, three styles, and 13 languages. Pro costs $29 a year.
For and against
For
- Generates context-aware alt text
- Provides chart descriptions and HTML tables
- Flags uncertain readings instead of guessing
- Images are processed without storage
- Free plan includes unlimited page scans
Against
- Human review is still required
- Free generation is limited to five images daily
- Generating checker fixes uses quota or Pro
- No CMS plugins are listed
The verdict
Alta combines image description generation with page-level alt-text checking and publishing guidance. Choose Pro when daily limits or bulk processing would constrain your workflow.
Who it suits
It suits website publishers, accessibility teams, and creators preparing image descriptions. Shopify and WordPress users can paste generated text into image fields, while Pro supports bulk catalog work.
Plans and prices
Free
5 images/day · unlimited page scans · 3 styles · 13 languages
Read 9 Oct 2026 · alttext-ai.com
Pro
Unlimited generations · bulk upload (50 at once) · CSV export · commercial use
Read 9 Oct 2026 · alttext-ai.com
On the record
- 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.alttext-ai.com · read 9 Oct 2026
- Charts and infographics
- For charts and infographics, Alta can return short alt text, a long description, and an HTML data table.alttext-ai.com · read 9 Oct 2026
- Context-aware output
- Users can provide page context so Alta can describe an image according to its function on the page.alttext-ai.com · read 9 Oct 2026
- Image input limits
- The upload accepts PNG, JPEG, WebP, and GIF images up to 4 MB each.alttext-ai.com · read 9 Oct 2026
- Image privacy
- Alta says images are processed in memory and never stored.alttext-ai.com · read 9 Oct 2026
- 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.alttext-ai.com · read 9 Oct 2026
- 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.alttext-ai.com · read 9 Oct 2026
- Uncertain results
- Alta says it flags labels or values it cannot read reliably instead of guessing, and can identify images that appear decorative.alttext-ai.com · read 9 Oct 2026
- 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.alttext-ai.com · read 9 Oct 2026
- WordPress workflow
- For WordPress, users paste generated alt text into an image's Alternative Text field in the media library.alttext-ai.com · read 9 Oct 2026
