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Accessibility Alt Tag Checker

Paste page URLs — we’ll fetch HTML, scan <img> tags and flag missing/empty/suspicious alt.

Paste up to 50 URLs (one per line)
Tip: Empty alt="" can be OK for decorative images, but meaningful images should have descriptive alt text.

Results

URL Alt summary Imgs Missing Empty Issues
Run a check to see results here.
Click a row to show image-level details below.

Quick interpretation

Alt text improves accessibility and helps search engines understand images.

  • OK most images have descriptive alt
  • Warning missing/empty/suspicious alt or repeated alt
  • Error fetch errors, loops, HTTP 4xx/5xx

Image details

Run a check and click a result row to populate this table.
Page Image Src Alt Status
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TXT format: page_url TAB image_src TAB alt TAB status TAB reason
Accessibility

Alt tag checker: improve image accessibility and SEO

The alt attribute describes images for screen readers and helps search engines understand visual content. Missing or low-quality alt text can harm accessibility and reduce relevance in image search.

What we check

  • Missing alt: <img> without an alt attribute.
  • Empty alt: alt="" (may be OK for decorative images).
  • Suspicious alt: generic words, file names, very long text, repeated text.

FAQ

What is alt text and why is it important?

Alt text (alternative text) describes an image for screen readers and search engines. It improves accessibility for people using assistive technologies and helps search engines understand image context for better indexing.

Is empty alt always bad?

No. alt="" is correct for purely decorative images that add no meaning. For content images (products, charts, buttons, icons that convey information), you should provide descriptive alt text.

How does this alt tag checker work?

The tool fetches the page HTML and scans all <img> elements. It flags images with missing alt, empty alt, or suspicious values so you can fix accessibility and SEO issues faster.

Why might the tool miss some images?

Some images are injected after the initial load (lazy loading, JS frameworks, sliders). This checker analyzes the initial HTML response and may not see images that appear only after JavaScript execution.

What is the difference between missing alt and empty alt?

Missing alt means the attribute is not present at all (often an accessibility error). Empty alt (alt="") is an intentional choice for decorative images so screen readers skip them.

Does this tool check alt text quality or just presence?

It mainly checks presence/emptiness and common red flags (too generic, looks auto-generated, etc.). Quality still requires a human check: the best alt text is short, specific, and matches the page context.

Can missing alt attributes affect SEO?

Yes. Without alt text, search engines get less context about images, which can reduce image-search visibility. Good alt text also improves topical relevance and helps pages with many visuals (e-commerce, portfolios, blogs).

How should I write good alt text?

Describe what matters in the image in a natural phrase. Avoid keyword stuffing, don’t start with “image of”, and keep it concise. For functional images (icons/buttons), describe the action (e.g., “Search”, “Download PDF”).