AI Alt Text Generator
Upload an image and get accurate, accessibility-friendly ALT text in seconds.
An AI alt text generator writes accurate image descriptions in seconds — the kind that screen readers announce for visually impaired users and that Google reads to understand your image context. Instead of writing alt text manually for every image, drop a file and get a ready-to-use description.
REXAI's Alt Text Generator uses AI vision to analyze what's actually in the image. Upload a photo, a screenshot, a chart, or a graphic — the tool returns a concise, descriptive sentence that meets accessibility standards and helps your images rank in Google Image Search.
What Is Alt Text?
Alt text (alternative text) is a short description that sits inside an image's HTML tag. It appears in three places: when a screen reader announces the image to a visually impaired user, when the image fails to load and the browser shows the text instead, and when Google indexes your image for search results.
Good alt text is specific, concise, and describes what the image shows — not what it means. "Golden retriever catching a frisbee on a beach at sunset" works. "Best dog toys" does not.
Why Alt Text Matters
Accessibility. Around 2.2 billion people worldwide have some form of visual impairment. Screen readers rely on alt text to describe images. Missing alt text means those users get nothing — the image is invisible to them.
SEO. Google can't "see" images. It uses alt text, filename, and surrounding content to understand what an image is about. Well-written alt text helps images rank in Google Image Search, which drives real traffic.
Broken images. If an image fails to load — slow connection, blocked CDN, moved file — the browser shows the alt text instead. Without it, your readers see an empty box.
How to Use the Alt Text Generator
1. Upload an image. Drag a file into the drop zone or click to browse. Supported formats include JPG, PNG, WebP, and GIF.
2. AI analyzes the image. The tool sends the image to an AI vision model, which describes what it sees in one clear sentence.
3. Copy the alt text. The result is a short, descriptive sentence ready to paste into your HTML. Edit it if you want — add context like brand name or product type.
Alt Text Best Practices
Be specific. Describe the subject, action, and setting. "Man hiking up a snowy mountain trail at dawn" beats "hiker."
Keep it short. Aim for 100–125 characters. Long alt text is cut off by screen readers and doesn't add SEO value.
Skip "image of" and "picture of". Screen readers already announce that it's an image. Start directly with the subject.
Don't stuff keywords. Alt text stuffed with keywords looks spammy and can hurt ranking. Write for humans first.
Decorative images can have empty alt. If an image is purely visual — a border, a divider — use alt="" so screen readers skip it.
Who Uses Alt Text Generation
Bloggers speed up post publishing by auto-writing alt text for every image. E-commerce sellers describe product photos at scale. Content marketers improve accessibility compliance without manual work. Web developers meet WCAG 2.1 standards automatically. News sites and publishers handle hundreds of images per day.
Frequently Asked Questions
- Is it free? Yes. Unlimited alt text generation, no signup, no watermark, no limits.
- Is my image uploaded to a server? Yes, for AI analysis. The image is processed and discarded — nothing is stored or shared.
- What formats does it support? JPG, PNG, WebP, and GIF. Maximum 5MB per image.
- Will the alt text be SEO-friendly? Yes. The AI is trained to describe images specifically and accurately, which is exactly what Google rewards.
- Can I edit the generated alt text? Yes. Copy it and modify to add brand context, product names, or specific details.
- What's the ideal alt text length? 100–125 characters. Enough to describe the image clearly without being cut off.
- Does it work for product photos? Yes. For products, the alt text describes what the product is, its color, and context — e.g. "Red leather handbag with gold clasp on wooden table."
Generate Alt Text Free
Upload your first image above and get a screen-reader-ready description in seconds. Free, accurate, and WCAG-friendly — no signup required.