Create clear, accessible and SEO-friendly image alt text in seconds. No AI API required.
1. Add an image
Processed locally in your browser — nothing is uploaded to any server or API.
Drag & drop an image
or click to browse (JPG, PNG, WEBP, GIF, SVG)
OR
Image Information
Start by uploading an image, or provide an image URL above.
2. Describe the image
There's no AI vision here — your description is what makes the alt text accurate.
3. Your generated alt text
Five rule-based variations, an accessibility & SEO score, and ready-to-use HTML.
Variations
HTML code
Filename SEO analyzer
Screen reader & visual preview
Alt Text SEO & Accessibility Score
0
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SEO & accessibility checklist
Readability
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Accessibility & alt text guide
A quick refresher on why alt text matters and how to write it well.
Alt text is a written alternative to an image, stored in the HTML "alt" attribute. It lets screen readers describe images to blind and low-vision users, gives search engines context about the image, and shows as fallback text if the image fails to load.
It makes your content usable for people with visual impairments, provides a fallback when images don't load, helps search engines understand and index your images, and is a required part of web accessibility standards (WCAG).
Purely decorative images that add no information — dividers, background textures, spacer graphics — should use alt="". This tells assistive technology to skip the image entirely.
Only when they naturally fit the description. Alt text should describe the image first; if a relevant keyword fits without forcing it, include it once. Never repeat a keyword multiple times — that's keyword stuffing and it hurts accessibility.
Advanced alt text tips
Be Specific
Describe the subject and detail that actually matters for understanding the image.
Be Concise
Avoid unnecessary detail — describe what's relevant, not everything visible.
Consider Context
The same image can need different alt text depending on the page and surrounding content.
Avoid Keyword Stuffing
Accessibility comes first — never repeat keywords just to try to rank higher.
Don't Repeat Nearby Text
If a caption already describes the image, alt text shouldn't just duplicate it.
Don't Describe Decorative Images
Use an empty alt attribute for images that carry no informational value.
Before & after examples
Bad: IMG_8392.jpg
Better: Woman hiking near a mountain lake
Bad: image of running shoes running shoes
Better: Black running shoes on a white background
Bad: beautiful beautiful beautiful mountain
Better: Snow-covered mountain peaks beneath a clear blue sky
Frequently asked questions
Alt text (alternative text) is a short written description added to the "alt" attribute of an <img> tag. Screen readers speak it aloud for people who cannot see the image, and browsers display it if the image fails to load.
There is no strict rule. Most accessible, useful alt text lands somewhere between roughly 20 and 125 characters — long enough to describe what matters, short enough to stay easy to listen to.
Only when the keyword genuinely and naturally describes the image. Alt text exists primarily for accessibility, not keyword placement.
No. Purely decorative images should use an empty alt attribute (alt="") so screen readers skip them.
No. This tool does not use computer vision or any AI image-recognition model. It helps you write high-quality alt text based on the context, subject, and purpose you describe.
No. There is no OpenAI, Gemini, Claude, or other paid AI API involved. Every suggestion is produced by rule-based logic running in your browser.
Yes, completely free, with no signup and no usage limits.
Ready to write better alt text?
No signup. No API keys. Just clear, accessible descriptions.
Paste an image URL and press send to generate alt text quickly.