Image Alt Text Checker
List the images on a page with their alt text, flagging what is missing, empty or duplicated, so the ones that carry meaning are described.
Browser tool
Page HTML
Paste Page HTML or upload a file. Everything is checked on your device; no website is contacted.
Used only to show full image URLs.
Missing alt is an accessibility failure; an empty alt="" deliberately marks a decorative image and is correct for dividers and logos already named by their link text.
About Image Alt Checker
Alternative text is what a screen reader announces and what a search engine reads as the content of an image. Missing alt is an accessibility failure; wrong alt is arguably worse, because it confidently describes the wrong thing. Free, needs no login, and works in the browser you already have open. Your markup is examined where you pasted it.
How to use Image Alt Checker
- Provide the page or markupEvery image element is found along with the alt attribute it declares.
- Read the three categoriesMissing entirely, present but empty, and present with text. Each means something different and only one of them is a definite problem.
- Fix the ones that carry meaningAn image conveying information needs a description; a decorative one needs an empty alt so it is skipped.
Empty alt is a decision, not an omission
alt="" tells assistive technology to skip an image, which is exactly right for a decorative flourish or a spacer. Omitting the attribute altogether tells it nothing, and some screen readers then read out the filename — so a user hears "underscore hero underscore banner two final dot jpg". Empty and absent look similar in a report and are opposites in practice.
What good alt text says
What the image conveys in this context, not what is literally depicted. The same photograph of a person at a laptop might be "Priya reviewing the quarterly figures" in an article and decorative in a marketing banner. Do not begin with "image of" — the technology already announced that.
What it does not do
- No tool can tell whether alt text is accurate. It can only report presence, length and obvious patterns like a filename used as a description.
- An image set as a CSS background never appears in the markup at all, so it is invisible here — which is itself a good reason not to use one for anything that carries meaning.
Image Alt Checker: questions people ask
- Should every image have alt text?
- Every image needs the attribute; not every image needs words in it. Informative images get a description, decorative ones get alt="" so they are skipped. The attribute being absent is the case that is always wrong.
- How long should alt text be?
- Long enough to convey what the image does and no longer — usually a short sentence. If it genuinely needs a paragraph, the information probably belongs in the page text where everyone can read it.
- How do I check alt text without a browser extension?
- Paste the page HTML or upload the file and every image is listed with its alt text, flagged as described, decorative (empty alt) or missing. Fill in Base URL with the address of the page to resolve relative image paths.
Questions about ToolsVerse itself — privacy, cost, what happens to your files — are answered in the frequently asked questions.
Related tools
The tools people most often need alongside Image Alt Checker.
Can’t find the tool you need?
Tell us what you’re looking for and we’ll consider adding it.