Free SEO Tool · Powered by AltMaster

Find every image
missing alt text.

Paste any URL. See exactly which images are missing alt text — then fix them all in one click with AltMaster, the Shopify app that auto-generates SEO-friendly alt text.

Works on any public page: Shopify product page, blog post, landing page. Reads the initial server-rendered HTML.
On Shopify? Skip the checker and install AltMaster — it scans your store and auto-fills every missing alt tag in minutes.
Install on Shopify →

Results

Scanned:
Total images
0
<img> tags found
With alt text
0
Descriptive alt set
Missing alt
0
No alt attribute
Empty alt
0
alt="" (decorative)
Alt text coverage
0%

Images missing alt text

Images with alt text

Shopify app

Fix every missing alt tag in one click.

Editing alt text by hand across dozens of products is brutal. AltMaster scans your entire Shopify store and auto-generates SEO-friendly alt text for every image — bulk, automatic, undoable.

Install AltMaster — Free
Why this matters

Alt text isn't just an SEO checkbox.

It's how Google understands your images, how screen readers describe them, and how shoppers see your products when an image fails to load.

🔍

Image SEO & Google rankings

Google reads alt text to understand and rank your images in Google Images and product searches. Missing alt = missing traffic.

♿

Accessibility (WCAG, ADA)

Screen readers rely on alt text to describe images to visually impaired users. Missing alt is a documented accessibility failure.

🛒

Shopify product discovery

Product alt text shows up in Google Shopping, social previews, and broken-image fallbacks. It directly affects clicks and conversions.

Common questions

An image is counted as missing alt when the <img> tag has no alt attribute at all. Empty alt (alt="") is reported separately because it is the correct choice for purely decorative images, but wrong for informative ones.
The tool reads the initial server-rendered HTML. Images injected later by JavaScript (some React/Vue components, lazy carousels, third-party app widgets) are not included. Most Shopify themes ship images in the initial HTML, so the count is usually accurate for storefronts.
No. The tool only fetches public URLs. Pages requiring auth, password-protected stores, and dev preview URLs cannot be scanned.
Yes, completely free. No sign-up, no email required, no spam. The page does run anonymous analytics so we can see how many people use the tool.
Manually: Shopify admin → Products → click product → click image → fill the "Image alt text" field. Repeat for theme images (theme editor) and blog/page images. This works, but takes hours if you have more than a handful of products.

Automatically: install AltMaster from the Shopify App Store. It scans your whole store and auto-generates SEO-friendly alt text for every product image in minutes. Free to install.
This page is the checker — it tells you which images are missing alt text on any URL. AltMaster is the fixer — a Shopify app that installs on your store and automatically writes alt text for every product image. Use the checker to see the problem; install AltMaster to fix it without manual work. See AltMaster on the Shopify App Store →