Image SEO · Answer

What is the difference between an image caption and alt text?

Alt text communicates an image’s meaning to people who cannot see it; a caption is visible explanatory text for everyone. They can complement each other without duplicating the same sentence. To apply this to your website, start with the specific page or setting involved. Both the non-visual description and visible context make sense together without unnecessary duplication. Follow the quick checks below or use the linked full guide for a more complete walkthrough.

A quick way to handle this

Start by confirming the live URL or record involved and what the visitor is trying to accomplish. Put that public explanation in a caption; use alt text to convey the important visual meaning to someone who cannot see it.

Avoid repeating entire paragraphs in both places, and use empty alt text for purely decorative images.

Practical example

A before-and-after diagram gets alt text describing the comparison; its caption explains how measurements were taken.

This is a hypothetical illustration; verify the facts and settings for your own website before applying it.

How to check the result

Both the non-visual description and visible context make sense together without unnecessary duplication.

Check the public version of the page, not only an editor preview. Record the affected URLs and whether any remaining issue needs a deeper review.

One mistake worth avoiding

Treating captions and alt text as interchangeable keyword containers.

Search engines choose their own ranking and indexing outcomes. Focus on producing an accurate, usable page rather than promising a particular placement.

Key takeaways

Determine whether the image needs a visible explanation for all readers, such as a chart source or a step number.
Avoid repeating entire paragraphs in both places, and use empty alt text for purely decorative images.
Both the non-visual description and visible context make sense together without unnecessary duplication.