Alternative text (alt text) is meant for readers who cannot see an image, such as blind readers and readers who use a text or mobile browser. It should summarize an image's purpose, and should not duplicate its caption. Every image should have alt text, except for purely decorative images, which should instead have "|alt=|link=".
Super Mario Galaxy 2
The following table shows images and captions on the left, and alt text and captions on the right: the right column is what a visually impaired reader will hear. This table was computed from the copy of Super Mario Galaxy 2 cached on 17 June 2013 at 01:53.
| Image and thumbnail | Text description |
|---|---|
 | Super Mario Galaxy 2 Box Art.jpg
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Cloud Mario is one of the new power-ups in the game. Mario is using the power-up, creating temporary platforms in midair to get to out-of-reach places.
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 | 4.5/5 stars
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| 4.5/5 stars
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 | Portal icon
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 | Portal icon
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 | Portal icon
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 | Book icon
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 | This is a good article. Click here for more information.
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 | Wikipedia book
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| Wikipedia book
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 | Portal
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