Image Alt Text Checker
Find images with missing, empty or unhelpful alt text on any page: file-name alt text, linked images without a label and overlong descriptions, with a CSV export.
Something not working, or missing a feature? Send feedback
About the Image Alt Text Checker
The Image Alt Text Checker lists every image in a page's HTML with its alt text and a verdict. It finds images with no alt attribute, linked images whose empty alt leaves the link without a name, alt text that is just a file name (IMG_2041.jpg, hero-banner-final), descriptions over 150 characters and alt text that starts with "image of". Images marked decorative with alt="" are listed separately, and the full list exports as CSV.
Our server requests the URLs you enter, like a crawler: it reads the response without running the page's scripts, and the analysis runs in your browser. The URLs and results are not stored.
How to use the Image Alt Text Checker
- Enter the page URL.
- Press Check alt text and fix the failed rows first: missing alt and empty alt on links.
- Rewrite file-name alt text to describe what the image shows, in one sentence.
- Leave alt="" only on purely decorative images such as icons next to text and dividers.
Works well with the Image Alt Text Checker
- Image Compressor: shrink the images while you are fixing them.
- Website SEO Checker: audit the rest of the page.
- Heading Checker: check the heading outline for screen readers.
Frequently asked questions
What makes good alt text?
Describe what the image shows and why it is there, in a sentence: "Bar chart of monthly sales, rising from 200 in January to 900 in June" rather than "chart". For a linked image, describe where the link goes. Skip "image of"; screen readers already say it is an image.
Does alt text help SEO?
Yes for image search: Google uses alt text, together with the surrounding text and file name, to understand images. It is also required for accessibility (WCAG 1.1.1), and in many countries accessibility is a legal requirement.
Related tools
Website SEO Checker
Check any page for on-page SEO problems: title, meta description, headings, canonical, robots.txt, noindex, structured data, alt text, HTTPS and speed, with a score.
Broken Link Checker
Find broken links on any web page: every internal and external link (and optionally image) is checked for 404s, server errors, timeouts and redirects. Export a CSV.
Redirect Checker
Check the HTTP status code and full redirect chain of up to 100 URLs: 301, 302, 404 and 5xx, response headers, loops and HTTPS downgrades, with fixes and CSV.
HTTP Status Checker
Check the HTTP status code of up to 100 URLs: 200, 301, 404, 500 and more, with what each means for SEO and a searchable list of every status code.
AdSense Readiness Checker
Check if your site is ready for Google AdSense: privacy policy, About and Contact pages, ads.txt, crawler access, thin pages, content risks and consent, before you apply.
Site Audit Tool
Crawl your website (up to 100 pages) and find broken pages, duplicate titles and descriptions, missing H1s, redirects, noindex, thin and slow pages. Export a CSV.