Free Image Alt Text Checker: Find and Fix Missing Alt Text
Paste your page URL and get a full report of images missing alt text, plus clear recommendations to fix them. The scan runs in seconds.
Catch Missing Alt Text
Scan any page and see exactly which images lack alt text, so nothing slips past Google or screen readers.
Boost Image SEO Rankings
Descriptive alt text helps your images rank in Google Images and adds context that strengthens on-page SEO.
Make Every Image Accessible
Alt text lets screen readers describe your images, keeping your site usable for everyone and closer to WCAG standards.
An image alt text checker scans the images on your page and reports which ones carry descriptive alt attributes and which are missing them. Alt text makes images accessible to screen readers and helps search engines understand visual content. This free tool lists every image, shows its current alt attribute, and flags empty or absent descriptions so you can fix gaps that hurt accessibility and image SEO.
What the image alt text checker inspects
The checker collects the image elements on the page you submit and inspects the alt attribute on each one. It reports images with no alt attribute at all, images with an empty alt value, and images whose alt text is present so you can judge its quality. It shows the source and existing description side by side, making it easy to spot placeholders, filename-style text, or overly generic wording. Decorative images, which are meant to carry an empty alt, are distinguished from content images that need a real description. The output gives you a clear inventory of which pictures are properly described and which need work.
How to read results and write better alt text
Prioritize images with missing or empty alt attributes that convey meaning, and write concise descriptions of what each one shows in context. Aim for natural, specific language rather than keyword stuffing, and skip phrases like image of, since screen readers already announce the element as an image. Leave alt empty only for purely decorative graphics so assistive technology can skip them. Replace weak alt text such as a raw filename with a description a person could picture. Where relevant, include a target term naturally if it genuinely describes the image. Recheck the page afterward to confirm every meaningful image now has appropriate alt text.
Why alt text matters for SEO and accessibility
Alt text is a core accessibility requirement, giving people who use screen readers an equivalent experience of your visual content, and it supports compliance with accessibility standards. It also feeds image SEO, since search engines rely on alt attributes to understand and rank images in image search, which can drive additional traffic. Descriptive alt text even helps when an image fails to load, showing readers what should have been there. Fixing missing and weak descriptions is a quick win that improves usability for every visitor and strengthens how search engines interpret the media on your page.
Frequently Asked Questions
What does the Image Alt Text Checker do?
Enter a page URL and the tool scans every image on that page, flags images with missing or empty alt attributes, and gives you clear recommendations on how to write alt text that helps both SEO and accessibility.
Is the Image Alt Text Checker free to use?
Yes. Create a free Brainito account and you can run the checker at no cost. Your account also unlocks the rest of Brainito's SEO tools, so you can audit titles, meta descriptions, and more from one place.
Why is alt text important for SEO in 2026?
Search engines cannot see images, so they rely on alt text to understand what each one shows. Good alt text helps your pages rank in Google Images, adds keyword context, and keeps your site accessible to visitors using screen readers.
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