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SEO Glossary

What is Alt Text (Alternative Text)?

Alt text (alternative text) is an HTML attribute added to image tags that describes the content and function of an image. It improves accessibility for screen readers and helps search engines understand image content for ranking in image search results.

Alt text serves double duty - improving accessibility for visually impaired users and helping your images rank in Google Image Search.

1

Why alt text matters

Alt text is important for: • Accessibility - Screen readers read alt text aloud for visually impaired users • SEO - Helps search engines understand image content and context • Image Search - Key factor in ranking in Google Image Search • Broken Images - Displays when images fail to load • Context - Provides meaning when images are blocked or unavailable Missing alt text is one of the most common SEO audit findings.
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Writing effective alt text

• Be descriptive and specific ("red Toyota Camry parked in front of auto repair shop") • Keep it concise - 125 characters or less is ideal • Include relevant keywords naturally • Don't start with "image of" or "picture of" • Describe the image's purpose, not just appearance • For decorative images, use an empty alt attribute (alt="") • For infographics, describe the key information • For buttons/icons, describe the action (alt="Submit form")
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Alt text and SEO

Google uses alt text to understand image content because it cannot "see" images the way humans do. Images with good alt text can: • Rank in Google Image Search • Appear in Google Discover • Support the page's keyword relevance • Earn featured snippets with images Avoid keyword stuffing in alt text - it should be natural and descriptive. Google may penalize pages with spammy alt text.
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Alt text in PixlSEO audits

PixlSEO audits check for: • Missing alt text on images • Empty alt attributes on non-decorative images • Very short or generic alt text • Keyword-stuffed alt text • Image file name optimization The Pixl Script can automatically generate and apply AI-optimized alt text to images on your client's website.

FAQ

Frequently asked questions

Should every image have alt text?
Every meaningful image should. Decorative images (borders, spacers) should use empty alt (alt="") to be skipped by screen readers.
Can PixlSEO generate alt text automatically?
Yes, the Pixl Script can use AI to generate and apply optimized alt text to images on your client's site.

Audit your image alt text

Run an SEO audit to find images missing alt text and get AI-generated suggestions.

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