AI Image Alt-Text Generator
Last updated: June 2026 · Free · No sign-up required
Upload an image to generate accessible, keyword-aware alt text, a descriptive file name, and a caption.
What is the AI Image Alt-Text Generator?
The AI Image Alt-Text Generator is a multimodal SEO and accessibility tool that uses advanced computer vision to analyze your images. With a single click, it generates three critical pieces of metadata: WCAG-compliant Alt-Text for screen readers, an SEO-optimized filename for Google Images, and a compelling caption for your blog or social media.
How to Generate SEO Image Metadata
- Upload an Image: Click the upload zone or drag and drop your image (JPG, PNG, or WebP).
- Add Context (Optional): If your image is part of a specific article (e.g., “A review of the new iPhone”), type that context into the optional field so the AI tailors the description perfectly.
- Analyze: Click the “Analyze Image” button.
- Copy Metadata: Instantly copy your Alt-Text, Filename, and Caption and paste them into your CMS (like WordPress or Shopify).
Why Image SEO Matters
- Boost Organic Traffic: Google Images is the second largest search engine in the world. Optimized filenames and alt-text are the primary ranking factors.
- Improve Accessibility: Visually impaired users rely on screen readers. Providing accurate, descriptive alt-text is crucial for a great user experience and is required by law in many jurisdictions (ADA compliance).
- Save Content Creators Time: Stop staring at an image wondering how to describe it. Let our Vision AI do the heavy lifting in seconds.
Frequently Asked Questions
What image formats can I upload?
You can upload standard web image formats including JPG, PNG, and WebP. The maximum file size is 4MB.
Why do I need a specific filename?
Search engines like Google read image filenames to understand context. An image named ‘img_9921.jpg’ provides zero SEO value, while ‘vegan-pepperoni-pizza.jpg’ helps you rank in Google Images.
Are the generated alt texts WCAG compliant?
Yes. The AI is trained to follow Web Content Accessibility Guidelines (WCAG), ensuring the descriptions are concise (usually under 125 characters), descriptive, and exclude redundant phrases like ‘image of’.
Quick reference
| Good alt text is | Why |
|---|---|
| Concise (≤125 chars) | Screen readers read it aloud |
| Descriptive | Conveys the image’s meaning |
| Context-aware | Matches the page topic |
| Free of “image of” | Redundant for screen readers |
Interpretation guide
| Benefit | Audience |
|---|---|
| Accessibility | Visually impaired users |
| SEO | Image search ranking |
| Resilience | Shown if the image fails to load |
Formula & methodology
Formula: Alt text: a concise, specific description (≤125 chars) of what the image shows and its purpose
The generator looks at an image and writes concise, descriptive alt text that helps screen-reader users and search engines understand it.
- Upload the image and add optional context about the page.
- The AI describes the key subject and relevant detail.
- It keeps the text concise and avoids “image of” filler.
- Copy the alt text into your img tag’s alt attribute.
Worked example: A product photo yields alt="Red leather messenger bag with brass buckle, front view".