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Alt Text Helper

Guide-based helper for writing good alt text — length limits, decorative vs functional check, and ready-to-paste output.

Updated April 2026
2/5quality score
  • FailAlt text provided
  • FailLength between 5 and 125 characters (0)
  • PassDoes not start with "image of" / "picture of" / "photo of"
  • PassNo target keyword provided (optional)
  • FailReads as a descriptive sentence (nouns + action)

Improvement tips

  • Write something — empty alt is only OK for decorative images.

What it does

Walks you through writing alt text the right way: decide whether the image is decorative (empty alt), informational (describe what matters), or functional (describe the action). Enforces a length budget (~125 characters) and flags common mistakes like "image of…" and redundant captions.

Pair with image dimensions checker, contrast checker, and social media image sizes for a quick accessibility pass.

How to use it

  1. Classify the image — decorative, informational, or functional.
  2. Write a description; the helper flags verbose phrases and length issues.
  3. Review the sample alt patterns for your use case.
  4. Copy the final alt text into your CMS.