Free Image Alt Text Generator
Upload any image and get 3 AI-generated, SEO-optimized alt text descriptions instantly. Improve accessibility and image search rankings — no signup required.
Click to upload
or drag and drop (Max 4MB)
JPG, PNG, WebP, GIF
Upload an image
Drop an image above to generate SEO-optimized alt text.
Why Alt Text Matters for SEO
Alt text is the bridge between your images and search engines. Without it, search engines cannot interpret what your images contain — so they skip them entirely.
Images with descriptive alt text are 34% more likely to appear in Google image search, driving incremental traffic to your site without any additional content work.
Accessibility
Screen readers rely on alt text to describe images to visually impaired users. Proper alt text is required for WCAG compliance and is the right thing to do.
Image SEO
Google Images drives 22.6% of all web searches. Descriptive alt text lets your images rank in this channel and surface your content to new audiences.
- Improves Lighthouse accessibility score instantly
- Helps images rank in Google Images and Discover
- Protects against broken image fallback experiences
<img src="product.jpg" /><img src="product.jpg"
alt="Organic skincare moisturizer
with rosehip oil in amber glass" />Lighthouse score: 62 → 98
Real accessibility improvement with AI-generated alt text
How to Use the Alt Text Generator
Three steps to go from blank alt attribute to SEO-optimized description in seconds.
Upload Your Image
Drag and drop or click to upload any JPG, PNG, or WebP. Images up to 4MB are supported.
AI Analyzes the Image
Our vision AI identifies objects, text, context, and actions in your image — the same way a human would describe it.
Copy & Use
Get 3 alt text variations optimized for both accessibility and SEO. Pick the best fit and paste it into your CMS.
Who Uses This Tool
Whether you manage a blog, an online store, or a client site, every image deserves proper alt text.
Blog Authors
Auto-generate alt text for every image in your posts without slowing down your publishing workflow.
E-commerce
Descriptive product image alt text that ranks in Google Shopping and drives qualified buyers.
Web Developers
Quickly add accessibility-compliant alt attributes to img tags without guessing at the right description.
Social Media
Optimize image descriptions for Pinterest and image search to drive discovery traffic from visual platforms.
What People Are Saying
Real feedback from developers, content managers, and designers who use this tool.
I have 200+ images on my site with missing alt text. This tool helped me fix them all in an afternoon.
The AI actually understands what's in the image. It doesn't just say 'image of a person' — it describes the context.
Finally stopped getting accessibility warnings in my Lighthouse audits. Every image now has proper alt text.
Frequently Asked Questions
What is image alt text?
Alt text (alternative text) is a written description of an image that appears when the image can't load and is read by screen readers. It's essential for web accessibility and helps search engines understand image content.
How does the AI generate alt text?
We use GPT-4o vision to analyze your image, identifying objects, text, people, actions, and context. The AI then generates 3 descriptive variations optimized for both SEO and accessibility.
Is my uploaded image stored?
No. Images are processed in memory and immediately discarded. We never store uploaded images on our servers.
What makes good alt text?
Good alt text is 40-125 characters, describes the image specifically (not "image of..."), includes relevant keywords naturally, and provides context that a blind user would find helpful.
How much does it cost?
Completely free. No signup, no limits on usage. We built this as a free resource for the web accessibility community.
Every Image Deserves
a Description
LazySEO automates keyword research, content creation, and publishing — so you rank on Google and AI search engines without the manual work.
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