Alt Text Over 100 Characters

What This Means

One or more <img> elements have alt text exceeding 100 characters. The description is present and non-empty, but it is longer than recommended for optimal alt text.

Why It Matters for SEO

Alt text is meant to be a concise description of an image's content and purpose. Very long alt text — running to multiple sentences — becomes less useful as a focused image description and more like a paragraph of text that happens to be in an alt attribute.

Extremely long alt text can also be a sign of keyword stuffing in the alt attribute — loading multiple keywords into image descriptions to manipulate image search rankings. This is a bad practice that can trigger quality signals.

What the Platform Checks

Measures the character count of each non-empty alt attribute. Fires when alt text exceeds 100 characters.

How to Fix It

• Trim the alt text to 50-100 characters — concise and descriptive.
• Describe what the image shows and why it matters in one phrase or short sentence.
• If the image needs a longer description for accessibility (complex charts, infographics): use the aria-describedby attribute to reference a longer description block in the page body, while keeping the alt attribute concise.
• Remove any keyword lists or SEO-motivated keyword repetition from alt attributes — describe the image, not your SEO goals.