AI Alt Text Generator
Upload any image and instantly generate accurate, SEO-friendly alt text. Improve your image rankings, pass accessibility audits, and stop writing alt text by hand. Free, no account needed.
AI Alt Text Generator
Upload an image, select a mode, and generate SEO-friendly alt text.
Your alt text will appear here
Upload an image, select a mode, and generate SEO-friendly alt text instantly.
AI Alt Text Generator — Write Better Alt Text in Seconds
🔍 Rank in Google Images
Alt text is the #1 signal Google uses to understand and index your images. Well-written alt text gets your images appearing in Google Images search — a traffic channel most sites completely ignore.
♿ Pass Accessibility Audits
16% of all web images are missing alt text. Screen readers rely on it to describe images to visually impaired users. WCAG 2.1 compliance requires proper alt text — our tool generates it in seconds.
⚡ Save Hours of Manual Work
Writing alt text for every image on your site is tedious and easy to skip. Whether you have 10 images or 10,000, our AI analyzes each one and outputs ready-to-paste alt text instantly.
What Is Alt Text and Why Does It Matter?
Alt text (alternative text) is a short written description added to an image's HTML tag. It serves two critical purposes: it tells search engines what an image contains, and it describes the image to visually impaired users relying on screen readers.
Google's own documentation states that alt text is the most important metadata element for image indexing — it directly determines whether your images show up in Google Images results. Sites with properly written alt text consistently outperform those without it in image search rankings.
What Makes Good Alt Text for SEO?
Most people either skip alt text entirely or write vague descriptions like "image1.jpg" or "photo." Both approaches waste the SEO value of every image on your page. Good SEO alt text is:
- Specific and descriptive — it tells exactly what's in the image, not just the general subject.
- Naturally keyword-relevant — it includes your target keyword only when it genuinely fits the description.
- Under 125 characters — search engines truncate longer alt text and screen readers read it aloud in full, so concise wins.
- Never keyword-stuffed — Google treats alt text spam as a ranking penalty signal, not a boost.
Our image alt text generator follows all of these rules automatically. You can also select SEO-Optimized mode and provide a focus keyword — the AI will weave it in naturally only if it genuinely fits the image.
Who Needs an Alt Text Generator?
Bloggers and content creators — every image you publish should have alt text. It takes seconds with this tool and gives each post a small but compounding SEO boost over time.
E-commerce store owners — product images without alt text are invisible to Google Shopping and Google Images. Our e-commerce mode writes product-focused alt text including color, material, and product name in the format that converts.
Web developers and designers — building a site and need to populate alt text across dozens of images quickly? Upload each one and copy the output straight into your code.
SEO professionals — auditing a client site with missing alt text? This tool handles it image by image with the precision needed for client deliverables.
Accessibility specialists — our WCAG mode generates fully compliant alt text that satisfies accessibility audit requirements and serves screen reader users properly.
Frequently Asked Questions (FAQ)
An alt text generator is a tool that analyzes an image using AI vision technology and automatically writes a short, descriptive text alternative for that image. This text is added to the HTML alt attribute of an <img> tag, where it gets read by search engines and screen readers.
Yes, completely free with no account or signup required. Upload your image, select your mode, and copy the generated alt text — that's it.
The widely accepted guideline is under 125 characters. This is because many screen readers cut off at that point, and Google tends to truncate longer alt attributes as well. Our generator targets this limit by default across all modes.
SEO-focused alt text naturally includes your target keyword while describing the image — it's written with Google's image indexing in mind. Accessibility-focused alt text (WCAG mode) prioritizes complete, accurate description for screen reader users, including text visible in the image, spatial context, and meaning. For most images, a well-written standard alt text serves both goals simultaneously.
No — only when it genuinely fits the description. Forcing your keyword into every alt text on a page looks like keyword stuffing to Google and can harm rankings rather than help. Use the SEO-Optimized mode and provide your focus keyword; the AI will include it only when it fits naturally.
Yes. Select E-commerce Product mode before uploading. The output is formatted for product images — it includes product type, color, material, and key visual attributes in the format that works best for Google Shopping and product image search.
PNG, JPG, and WebP up to 10MB — the same formats supported across your other Elevato tools.
No. Images that are purely decorative (dividers, background patterns, aesthetic icons) should use an empty alt attribute: alt="". This tells screen readers to skip the image. If you upload a decorative image, select Standard mode and if the AI detects no meaningful content, it will output the empty alt attribute automatically.