AI image alt text
generator.

Upload an image or paste an image URL to generate accurate alt text for accessibility, SEO, and social posts.

Drop an image here, or browse

PNG, JPG, GIF, WebP

Free alt text generator for images

AltCaption creates concise image alt text from uploads or direct image URLs. Use it for blog images, product photos, portfolio galleries, CMS media libraries, and social posts that need better accessibility text.

The generator works best when you want a practical first draft: describe the visible subject, keep the wording clear, then adjust the result for page context before publishing.

When to use it

  • Generate image alt text before publishing a new page.
  • Rewrite missing or vague alt tags for SEO cleanup.
  • Create consistent descriptions for product and gallery images.
  • Draft Instagram alt text before posting visual content.

Upload or URL

Drop a PNG, JPG, GIF, or WebP file, or paste a hosted image URL when the image already lives online.

Accessibility first

Results are written as plain alt text, not captions packed with keywords or file names.

Bulk when needed

For product catalogs and CMS migrations, use the bulk alt text generator to process many image URLs.

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