Alt Attribute Generator | AltCaption

AltCaption

2 min read Original article ↗

Free tool

Generate a concise description and copy it as an HTML-ready `alt=""` attribute. Use this when you are editing markup, a static site, documentation, or a CMS block with raw HTML.

Good for

  • Update HTML image tags.
  • Prepare CMS alt fields.
  • Avoid file-name fallback text.

HTML-focused output

  • Generates the readable alt text first.
  • Escapes quotes, angle brackets, and ampersands for attribute safety.
  • Returns a copy-ready `alt="..."` snippet.

When not to add alt text

  • Use `alt=""` for purely decorative images that add no content.
  • Do not duplicate nearby captions or headings word-for-word.
  • For linked images, describe the destination or action when that is more useful.

Example output

For an article image of a dashboard screenshot, copy the generated attribute into the `<img>` tag after checking it against the screenshot.

Related free alt text tools

Image alt text checker

Check a page for missing, empty, duplicate, or weak image alt text. Generate fixes for images that need better descriptions.

Bulk image alt text generator

Paste a short list of hosted image URLs to preview generated alt text, then use AltCaption Pro for larger batches, TSV export, and account history.

Product image alt text generator

Generate product image alt text with product name, category, and visible details as publishing context.

Bulk edit Shopify image alt text from a product CSV

Bulk edit missing Shopify product image alt text from a CSV. Audit blank rows, generate review-ready drafts, and download a preserved import file.

Image alt text validator

Check image alt text for empty, generic, overly long, or keyword-stuffed wording, then generate a replacement draft from an image URL.

Social image alt text generator

Generate concise alt text drafts for Instagram, Pinterest, Bluesky, X, and other social images using platform, topic, and visible-text context.