alt attribute

What alt attribute means

The defect is absence, and a check that fails on empty alt reports every decorative icon as a fault.

Where alt attribute comes up on this site

• Page builders drop the main landmark: nine HTML checksThe third counts images with no alt attribute at all; zero is the target.

Related terms in Indexing and discovery

Whether a page can be found and kept, separately from whether it can be fetched.

nosnippet · max-snippet · max-image-preview · unavailable_after · noimageindex · index coverage · canonical · noindex · X-Robots-Tag · orphan page · E-E-A-T · E-E-A-T proxies · topical authority · Soft 404 · case consistency · accessibility structure · landmark region · accessible name · skip link · main landmark · form control name · duplicate id · IndexNow · faceted navigation · thin content · duplicate content · near-duplicate · boilerplate · MinHash · shingle · dead anchor · placeholder content · image placeholder · alt text · EXIF

Questions about alt attribute

What is alt attribute?

The text alternative on an image. Present and empty marks the image as decorative and is correct; present and descriptive is read aloud; absent entirely makes a screen reader announce the file name.

What does alt attribute not show or guarantee?

Present and empty marks the image as decorative and is correct; present and descriptive is read aloud; absent entirely makes a screen reader announce the file name.

Which area of the glossary does alt attribute belong to?

Indexing and discovery: Whether a page can be found and kept, separately from whether it can be fetched.

← main landmark  ·  form control name →

See it in the full glossary · 772 terms across 19 areas.