Free Tools › AI Image Describer › Alt Text

AI Alt Text Generator

Upload any image and get a single-sentence alt text under 125 characters — WCAG 2.1-compliant, ready to paste into your alt attribute.

Open the AI Image Describer Free, no signup. 3 descriptions per day.

Why use AI for alt text?

Alt text is the most-skipped accessibility feature on the web. Every image on a public site is supposed to have it; almost none do. An AI alt text generator removes the excuse — upload an image, get a compliant alt-text sentence in seconds. Use it for accessibility audits, ADA compliance work, or to backfill alt text across a 500-image catalog.

The AI image describer returns three forms of the description in one click: a detailed paragraph, a short caption, and a WCAG-compliant alt text under 125 characters. For most alt text workflows, the alt text is the field you'll use most — but the longer description is there when you need more depth.

Common alt text workflows

WCAG 2.1 / ADA compliance

Public sites need alt text on every meaningful image to meet accessibility law and standards. The generator drafts compliant alt text instantly.

Ecommerce product alt text

Shopify, Amazon, and Etsy all expect alt text on product images. Better alt text → better marketplace SEO.

Blog post images

Long-form blog posts with embedded images need alt text per image. Bulk-describe your image folder to backfill.

Social media accessibility

Posting to LinkedIn, X, Mastodon? Add AI-generated alt text to your image so screen-reader users get the content.

Email newsletter images

Marketing emails with images need alt text — most email clients block images by default, and alt text is what readers see.

Accessibility audits

Auditing a website for accessibility compliance? Run every image through the generator to draft missing alt text in bulk.

How to use the AI Image Describer for alt text

  1. Upload your image to the AI Image Describer. JPG, PNG, or WebP up to 10MB.
  2. Click Describe. The AI reads the image and writes the detailed description, short caption, and accessibility alt text in one pass.
  3. Copy the field you need — long description, caption, or alt text. Each has its own copy button.

Try it now →

Frequently Asked Questions

How long is the alt text?
Under 125 characters and a single sentence — the standard length screen readers handle gracefully and that meets WCAG guidance.
Is the alt text WCAG 2.1 compliant?
Yes — it follows WCAG 2.1 best practices: descriptive, concise, no "image of" prefix, no redundant punctuation.
Can I use the alt text commercially?
Yes. All output is yours to use however you want — including on commercial sites, paid plugins, and client work.
How does this compare to Microsoft / Google's automatic alt text?
Browser-level auto alt text exists but is usually generic ("may contain: a person"). PixelPanda's output is specific and descriptive — closer to what an accessibility consultant would write by hand.
Can I bulk-generate alt text?
The free tool is one image at a time, 3 per day. For bulk generation across hundreds of images, use AI Analyzer Pro inside the dashboard or our API v2 with batch processing.
What if my image is purely decorative?
Decorative images should have alt="" (empty alt). The generator always produces text — for purely decorative images, override its output with an empty alt.
Does it work on infographics?
Yes — the generator describes what an infographic shows. For complex infographics, also include a long description on the page (alt text alone isn't enough for complex visual data).

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Ready to use AI for alt text?

Free, no signup, 3 descriptions per day. For bulk processing across hundreds of images, sign up and use AI Analyzer Pro inside the dashboard or our API v2 with batch processing.

Open the AI Image Describer