Image alt attribute checker, free and online
Images with no description, and descriptions that describe nothing
Everything is computed in your browser. Nothing is stored.
The alt attribute serves two audiences at once: people browsing with a screen reader, and engines that have no other way of knowing what an image shows. A useful audit does more than count missing alts: it separates the absent attribute from the deliberately empty one, which is correct on a decorative image, and flags descriptions that are not descriptions.
How to use it
How it works
Paste an address
The tool reads the page and collects every image tag with its alt attribute, its source and its context.
Read the four groups
Attribute absent, image link with no name, file name copied across, deliberately decorative image.
Deal with the first group
Images with no alt attribute are the only ones that pose a real accessibility problem in every case.
Worth knowing
Four things to keep in mind
Absent and empty are not the same thing
alt="" declares a decorative image, which a screen reader deliberately skips. That is correct. An attribute that is simply missing leaves the reader announcing the file name.
An image alone in a link must be described
If the image is the only content of a link, its alt becomes the name of the link. Left empty, the link is announced without a name and the user has no idea where it goes.
Describe the function, not the pixels
For a dish on a menu, "beef tartare with hand-cut chips" beats "photo". For a clickable logo leading home, the right alt is the name of the site.
No "image of", no stacked keywords
The screen reader already announces that it is an image. And an alt stuffed with keywords is a practice Google explicitly lists as against its guidelines.
FAQ
Frequently asked questions
Every image needs an alt attribute. Its value may be empty when the image is purely decorative, which is a statement in itself. It is the absence of the attribute that causes trouble.
A short sentence, a hundred characters at most. Beyond that the screen reader becomes tiring to listen to, and the description loses the precision that made it useful.
For image search, yes, it is the main content signal. For ordinary search the effect is marginal. Accessibility remains the best reason to fill it in.
They have no alt attribute and are not read by a screen reader. That is fine for decoration, but an image carrying information should not be set as a background.
Also
Other tools in the same family
Also
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