Image Alt Tag Checker

What Is an Alt Tag?

An alt tag (short for alternative text) is an HTML attribute added to an <img> tag to describe the image’s content. It supports SEO and accessibility so search engines and screen readers understand what an image represents.

Why Alt Tags Matter

Search engines can’t “see” images — they interpret them via alt text. Well-written alt tags:

• ✔ Help images surface in Google Image Search
• ✔ Improve accessibility for screen reader users
• ✔ Boost page relevance for target topics
• ✔ Provide fallback text if images fail to load

Best Practices for Alt Text

• ✔ Be descriptive and specific
• ✔ Keep it concise (aim < ~125 characters)
• ✔ Use keywords naturally only when relevant
• ✔ Use empty alt="" for purely decorative images
• ✔ Don’t repeat “image of” unless needed for context

Good vs. Bad Examples

Good: alt="Golden retriever puppy playing with a tennis ball"

Bad: alt="Dog, cute dog, dog picture, puppy dog, pet, animal" (keyword stuffing)

Alt Text – FAQ

Does alt text help SEO?

Indirectly, yes. It improves image understanding, helps images rank, and boosts topical relevance for the page.

How long should alt text be?

Keep it brief and specific — ideally under ~125 characters for screen readers while capturing essential detail.

When should I use empty alt=""?

Use alt="" on purely decorative images so screen readers skip them.

Should I include keywords?

Only if they naturally describe the image and match on-page content. Avoid stuffing.

What about images that link to pages?

Write alt text that describes the destination or action (e.g., “Download pricing guide”), not just the picture.