How to Add Alt Text to Images in Word (Step-by-Step Guide)

Introduction

Alt text (alternative text) provides image descriptions for users unable to view images directly. Beyond accessibility compliance, alt text improves document searchability and SEO. Professional documents include proper alt text on all meaningful images.

Method 1: Adding Alt Text

Quick Alt Text Entry

1. Right-click image
2. Select “Alt Text”
3. Alt Text dialog opens
4. Type description of image content
5. Click OK
6. Alt text attached to image

Method 2: Detailed Alt Text

Comprehensive Descriptions

1. Right-click image
2. Select “Alt Text”
3. Title field: Brief title (optional)
4. Description field: Full description (1-2 sentences)
5. Include relevant details for context
6. Click OK

Writing Effective Alt Text

1. Be descriptive: What the image shows
2. Be concise: 100 words maximum
3. Avoid: “Image of,” “Picture of,” “Screenshot showing”
4. Include context: Why image matters
5. Specific details: Names, numbers, important elements

Best Practices

1. Write alt text for all meaningful images
2. Keep descriptions focused and relevant
3. Maintain consistency throughout document
4. Update alt text if image changes
5. Test document with screen reader

よくある質問

Q: How do decorative images differ? A: Mark as decorative in dialog. Screen readers skip these, reducing noise for visually impaired users.

Conclusion

Alt text is essential for accessible, professional documents. By writing clear, concise descriptions, you ensure all readers can understand image content while improving document searchability.