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Alt Text Quality Checker

Analyze image alt text for accessibility best practices. Get scoring, improvement suggestions, and WCAG compliance tips. Free alt text tool.

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WCAG 2.1 Alt Text Guidelines

SC 1.1.1 Non-text Content (Level A): All non-text content must have a text alternative that serves the equivalent purpose.

Best Practices:

  • Be specific and descriptive — describe what the image shows and why it matters
  • Keep it concise — aim for under 125 characters (screen readers may truncate longer text)
  • Do not start with "image of" or "picture of" — screen readers already announce it as an image
  • Do not include file names or extensions — describe content, not technical details
  • Consider the image's context — the same image may need different alt text on different pages
  • Use empty alt (alt="") for purely decorative images that add no information
  • For complex images (charts, infographics), provide a brief alt and a longer description nearby

How to Use Alt Text Quality Checker

1

Open Alt Text Quality Checker

Navigate to Alt Text Quality Checker in your browser — no installation or sign-up required.

2

Enter your data

Type, paste, or upload the content you want to process into the input area.

3

Configure options

Adjust any available settings to customize the output to your needs.

4

Get your result

The result appears instantly. Copy it to your clipboard or download it as a file.

Frequently Asked Questions

Alt Text Quality Checker is a free online web development tool. Analyze image alt text for accessibility best practices. Get scoring, improvement suggestions, and WCAG compliance tips. Free alt text tool.