What is alt text and why does it matter for SEO?

Alt text (alternative text) is an HTML attribute that describes an image's content. It matters for SEO because search engines can't 'see' images — they rely on alt text to understand and index image content. Good alt text improves image search rankings and overall page SEO.

How long should alt text be?

Aim for 80-125 characters. Alt text shorter than 80 characters often lacks enough detail for search engines and screen readers. Longer than 125 characters becomes unwieldy and may get truncated. Our tool highlights the ideal range with color-coded character counts.

Should I include keywords in alt text?

Yes, but only when the keyword fits naturally. Include your target keyword if it accurately describes what the image shows. Never stuff keywords — Google penalizes forced keyword insertion. One relevant keyword per alt text is sufficient.

What's the difference between alt text and image title?

Alt text describes the image content for accessibility and SEO — it's read by screen readers and search engines. The image title is a tooltip that appears on hover. Alt text is essential; title is optional. Focus your SEO efforts on alt text.

Do decorative images need alt text?

Decorative images that don't convey content (borders, spacers, background patterns) should have an empty alt attribute (alt="") so screen readers skip them. Only images that add meaning to your content need descriptive alt text.

Free Tool — No Signup Required

Alt Text Generator

Name: RobotSpeed
Availability: InStock
Rating: 4.9 (127 reviews)
Author: RobotSpeed

Describe your image and get 5 SEO-optimized alt text suggestions. 100% free, no signup required.

Image Description

0/500

Page Context (optional)

Target SEO Keyword (optional)

Alt Text Suggestions

Describe your image above and click "Generate Alt Text" to get started.

Automate your entire SEO content pipeline with RobotSpeed

Generate SEO-optimized articles with perfect alt text, meta tags, and schema markup — on autopilot.

How It Works

Describe your image

Tell us what's in the image — people, objects, actions, setting.

Add context & keyword

Optionally add your page topic and target keyword for better SEO alignment.

Get 5 alt text options

Receive 5 optimized alt text variations with character count and SEO score.

Alt Text Best Practices

Be Descriptive & Specific

Describe what the image shows, not what you want it to mean. "Golden retriever catching a frisbee in a park" is better than "dog playing".

Keep It 80-125 Characters

Alt text that is too short lacks detail for screen readers and SEO. Too long and it becomes overwhelming. 80-125 characters is the sweet spot.

Include Keywords Naturally

If your target keyword fits naturally, include it. Never stuff keywords — search engines penalize forced keyword insertion in alt text.

Don't Start with "Image of"

Screen readers already announce "image" before reading alt text. Starting with "image of" or "picture of" is redundant and wastes characters.

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