Tools
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Alt Text Checker
Find which images on your page are missing alt text.
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No images found on this page.
Every image on this page already has alt text.
image(s) found, missing alt text
Alt text missing
Empty alt (decorative)
Why does alt text matter for SEO and accessibility?
The alt attribute on an image tag gives it a text description — read by Google Images for indexing, and read aloud by screen readers for visually impaired users. An image with no alt text is effectively "invisible" to machines: it can't show up in image search, and it's inaccessible to screen reader users. Unlike hreflang, which only applies to multilingual sites, alt text matters for every single site, regardless of language.
Frequently asked
Questions about the Alt Text Checker
What's the difference between alt="" (empty) and having no alt attribute at all?
A deliberately empty alt="" means the image is purely decorative (like a border or visual icon) — that's valid and recommended. Having no alt attribute at all is a problem, because browsers and screen readers can't tell whether that was intentional or just forgotten.
Why does alt text matter for SEO?
Google can't "see" an image the way a person can — alt text is one of its main signals for understanding what's in it, and it affects your odds of showing up in Google Images.
What's the ideal alt text length?
Around 125 characters, descriptive and specific. Avoid just writing "image" or a raw filename like IMG_1234.jpg.
Does every image need alt text?
Ideally, yes. A purely decorative image can deliberately use an empty alt="" — but that's different from omitting the attribute entirely.
