Image alternative text worksheet
Guide purpose-based human descriptions and decorative-image choices.
How to use Image alternative text worksheet
The image alternative text worksheet helps you write alt text based on an image's purpose. Choose informative, decorative or functional, describe the meaning or function, and add nearby context; it returns a ready alt attribute with purpose-specific guidance. Decorative images get an empty alt attribute. It does not analyze images and does not certify accessibility.
- Paste the source into the input editor, or load the built-in example.
- Set image purpose, meaning / function, nearby text / context.
- Run image alternative text worksheet, review the output, then use the available copy or download controls.
What this tool supports
Guide purpose-based human descriptions and decorative-image choices.
- Image purpose
- informative · decorative · functional
- Meaning / function
- Set this value for your task.
- Nearby text / context
- Set this value for your task.
Limits and processing
Images use the existing 32-megapixel canvas bound. Up to 100 source images are allowed where supported. Pasted HTML is bounded to 200,000 characters; Mermaid diagrams to 20,000 characters and 300 lines. SVG and PNG generation require a browser.
Frequently asked questions
When should alt text be empty?
Choose decorative only when the image adds no meaning, such as an ornamental divider. The worksheet then outputs alt="" so assistive technology can skip the image, and ignores any description you typed.
How do I write alt text for a linked image or button?
Pick functional and describe the action or destination, such as Search or Go to home page, rather than what the picture looks like. The worksheet places your text in an alt attribute with quotes and special characters escaped.
Does this tool generate alt text automatically from an image?
No. You write the description and nothing is inferred from the image. The context field is a reminder to avoid repeating nearby page text; it appears in the worksheet but not in the alt attribute.
Where is my input processed?
This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.
What are the input limits?
Images use the existing 32-megapixel canvas bound. Up to 100 source images are allowed where supported. Pasted HTML is bounded to 200,000 characters; Mermaid diagrams to 20,000 characters and 300 lines. SVG and PNG generation require a browser.