Image Alt Text: Describe Meaningful Images Without Noise

Alt text is primarily an accessibility feature, but it also improves image context for systems that cannot see the page.

The goal is useful description, not keyword dumping.

What It Is

Alt text is the alt attribute on an image. It provides a text alternative for the meaning carried by that image.

<img src="/dashboard.png" alt="Launch report dashboard showing 92 overall score and 3 warnings">

Why It Matters

• Screen readers announce it when the image matters.
• It preserves meaning if the image fails to load.
• It improves content clarity for non-visual systems.

Best Practices

1. Describe the purpose or information the image adds.
2. Keep decorative images empty with alt="".
3. Be concise and specific.
4. Do not repeat surrounding captions word for word unless needed.

Common Mistakes

• Leaving meaningful images without alt text.
• Stuffing keywords instead of describing content.
• Writing image of when the image meaning is the important part.

Quick Checklist

• Meaningful images have alt text.
• Decorative images use empty alt.
• Descriptions are concise and useful.

Final Takeaway

Alt text should carry meaning, not marketing filler.