Image Alt Text Checker
Find images missing alt text for SEO & a11y.
About this tool
Check every image on a page for alt text. Paste your HTML to find images that are missing alt attributes, have empty alt text, or use overly long descriptions — improving both SEO and accessibility.
Key Features
- Counts images with/without alt
- Flags empty alt attributes
- Warns on very long alt text
- Lists each image and its alt
- Runs privately in your browser
How to Use
- Paste your page HTML.
- Click Analyze.
- Review images missing alt text.
- Add descriptive alt attributes.
Benefits
- Improve accessibility (WCAG)
- Boost image SEO
- Help screen-reader users
Frequently Asked Questions
Content images need descriptive alt text. Purely decorative images should use an empty alt="" so screen readers skip them.
Aim for a concise description under ~125 characters.