Enter any page URL. MrKeyword fetches the live HTML and lists every image with its alt text, flagging images with no alt attribute, a file name, a generic word or overlong alt text, and image links that screen readers would read as empty.
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Built on first-party data from Google and Bing
Alt text is the alt attribute on an <img> tag: a short written description of the image. Screen readers read it aloud to blind and low-vision visitors, browsers show it when the image fails to load, and Google uses it to understand what the image shows.
For search, alt text is one of the main signals Google Images uses to match a picture to a query, together with the file name, the caption and the text around it. Google recommends alt text that is useful and descriptive, written for people rather than stuffed with keywords. When an image is a link, its alt text also works as the link's anchor text.
Not every image needs words. A purely decorative image, such as a divider or a background flourish, should have an empty alt="" so screen readers skip it. Leaving the attribute out is different: many screen readers then read the file name instead. This checker lists each image with its state, so you can tell the decorative ones from the ones that were forgotten. For the rest of the page basics, use the on-page SEO checker.
Each <img> tag and image button in the HTML, with a thumbnail, the full image address (from src, data-src or srcset for lazy-loaded images) and its alt text, problems first.
No alt attribute, empty alt for decorative images, file names such as IMG_1234.jpg, generic words such as “image” or “logo”, alt text over 125 characters, and linked images with no text at all.
The fictional northwind-plumbing.example rebuilt its services page with a page builder. The logo links to the home page, the photos were uploaded straight from a phone, and one icon was added without any alt attribute. This is what the checker shows for https://northwind-plumbing.example/services/:
6 images2 no alt1 file name1 generic1 empty0 too long1 OK
| Image | Image URL | Alt text | State |
|---|---|---|---|
 | https://northwind-plumbing.example/img/logo.svgInside a link | No alt attribute | Empty link |
 | https://northwind-plumbing.example/img/phone.svg | No alt attribute | No alt |
 | https://northwind-plumbing.example/img/IMG_2041.jpg | IMG_2041.jpg | File name |
 | https://northwind-plumbing.example/img/van.jpg | photo | Generic |
 | https://northwind-plumbing.example/img/divider.png | alt="" | Empty (decorative) |
 | https://northwind-plumbing.example/img/boiler-repair.webp | Engineer replacing the pump on a combi boiler | OK |
Example result for a fictional website (northwind-plumbing.example). It is produced by the checker's own code from the setup described above; run the checker for your own pages.
Three fixes cover this page. The linked logo needs alt text that names the destination, such as alt="Northwind Plumbing home", otherwise screen readers announce an empty link and Google gets no anchor text. The phone photo and the van photo need real descriptions instead of IMG_2041.jpg and photo. The phone icon sits next to a visible phone number, so it is decorative and should get alt="", like the divider. Read how to write image alt text for examples, and check the rest of the page with the on-page SEO checker.
Common on images added by page builders, sliders and CMS uploads. Add a short description, or alt="" if the image is decoration.
Some CMSs copy the file name into the alt field on upload, giving alt text like IMG_1234.jpg or hero-banner-final.png. Replace it with what the image shows.
Alt text like “image”, “photo” or “logo” tells nobody anything. Describe the picture, and use the brand name for a logo.
A linked logo or icon with no alt text and no visible text is an empty link. The alt text should say where the link goes.
Long strings of keywords are hard to listen to and Google treats them as spam. Keep alt text short, specific and written for people.
Check alt text whenever images are added in bulk or a template that outputs images changes.
Yes, mainly for Google Images. Google reads alt text, together with the file name and nearby text, to understand what an image shows and when to show it in image results. For a linked image, the alt text also acts as the link's anchor text.
Every image should have an alt attribute, but not every image needs words in it. Images that carry meaning need a description; purely decorative images should use an empty alt="" so screen readers skip them.
Short: usually one sentence, well under 125 characters. Many screen readers handle longer text poorly, and long alt text is often a sign of keyword stuffing. Put long explanations, such as what a chart shows, in the page text or a caption.
A missing alt means the attribute is not there at all, so a screen reader may read the file name aloud. An empty alt (alt="") is a deliberate signal that the image is decorative and can be skipped.
The checker reads the HTML the server sends. Images added later by JavaScript, CSS background images and images inside iframes are not in that HTML, so they are not listed. Images inside noscript fallbacks are skipped to avoid counting lazy-loaded images twice.