Image Compressor
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Open toolFree accessibility writing utility
Image Alt Text Helper
Describe the important image details and how the image is used. Get an editable alt-text draft and a quick reminder about decorative images.
Include only details that help someone understand the image in this page.
0 / 300 characters
Write concise, specific text that communicates the image's purpose. This helper uses your description; it does not inspect the image.
Your text stays in your browser. No image is uploaded or analyzed.
How to use the Image Alt Text Helper
- Choose the image purpose from the dropdown: informative, functional (a link or button image), or decorative.
- Type what the image shows in the 'What is shown in the image?' field, for example a red bicycle leaning against a brick wall, and add optional page context.
- Click 'Create draft' to build an editable alt-text draft, with a live character counter capped at 300 characters.
- Review the wording for accuracy, adjust it as needed, then click 'Copy alt text' to paste it into your CMS or HTML.
Why it matters
Alt text helps search engines understand what an image shows, which supports rankings in image search and gives the image context for the page. It also makes your content accessible to screen-reader users, and for functional images the alt text works as link text, which is a ranking factor too. Writing concise, purposeful alt text instead of keyword-stuffed descriptions protects both accessibility compliance and image SEO performance.
Image Alt Text Helper FAQs
Should every image have descriptive alt text?
No. Informative images need a concise description of what matters visually. Decorative images that add no information should use an empty alt attribute so screen readers skip them. Functional images, like a linked icon, should describe the action or destination rather than the picture itself.
Does this helper use AI to see my image?
No. The draft is assembled only from the description and page context you type in, capped at 300 characters. Nothing is uploaded or analyzed, so always review the draft and confirm it accurately describes the real image before pasting it into your page.
How long should alt text be?
Keep it concise, usually under 125 characters, since many screen readers cut off longer text. Describe only the visual details that matter in the page's context. The helper's 300-character cap leaves room, but shorter drafts almost always read better for both accessibility and image search relevance.
Do I need to upload my image to use the tool?
No upload is needed. You simply describe the image in your own words and select its purpose. This keeps the tool instant and private, and it also forces you to think about the image's role on the page, which is exactly what good alt text requires.