SEO Tools

Image Alt Text Checker

Check a page for images missing alt text.

Enter a URL to check how many images are missing alt text.

More SEO Tools

Heading Structure Checker Structured Data / Schema Checker Twitter Card Checker Indexability Checker Open Graph Checker SEO Health Score Canonical URL Checker Meta Tags Preview

JustChecker tracks your on-page SEO signals continuously.

What Is Alt Text?

The alt attribute describes an image for screen-reader users and search engines, and is shown if the image fails to load. This tool lists a page's images that are missing alt text.

When to Use It

During accessibility or SEO reviews.
For product and blog images you want to rank in image search.

How to Use It

Enter the page URL.
Add alt text to the flagged images.

Understanding the Result

Describe what the image shows in a short sentence. Purely decorative images should have an empty alt (alt="") so screen readers skip them.

Limitations

The tool checks whether alt text exists, not whether it is helpful. Images added by JavaScript are not included.

Good and Bad Alt Text

Image	Poor alt text	Better alt text
Product photo	`IMG_4521.jpg`	`Blue ceramic coffee mug, 350 ml, with a wooden handle`
Chart	`chart`	`Bar chart: mobile traffic grew from 40% to 65% in 2025`
Team photo	`image`	`The five-person support team at the Pune office`
Decorative divider	`line`	`alt=""` (empty, so it is skipped)

Writing Tips

Describe what matters in the context of the page, in one short sentence.
Do not start with "Image of" - screen readers already announce it as an image.
For a linked image, describe where the link goes.
Include a keyword only when it genuinely describes the image; stuffing keywords is unhelpful and can hurt.

Why It Matters

Alt text makes images understandable for blind and low-vision users, is required by accessibility standards such as WCAG, and helps images appear in Google Images - a real traffic source for product and recipe sites.

Also check heading structure and meta tags. For image file sizes, try the Image Optimization Checker.

Frequently Asked Questions

Alt text is also how search engines understand image content for image search indexing, and it displays as fallback text if an image fails to load for any visitor, regardless of ability.

Purely decorative images should use an empty alt attribute (alt="") specifically so screen readers skip over them entirely, rather than announcing irrelevant filler that adds no value for the listener.

Good alt text concisely and accurately describes what the image actually shows or conveys in context; bad alt text is either missing entirely, generic ("image1.jpg"), or stuffed with unrelated keywords purely for SEO manipulation.

No - search engines are well-attuned to identifying keyword-stuffed, inauthentic alt text, and it can actively hurt rather than help, on top of providing a genuinely poor experience for screen reader users.

Every meaningful, content-conveying image should have it - the count varies entirely by page, but a page with several images missing alt text entirely represents a real, fixable accessibility and SEO gap worth addressing.