AI Alt Text Generator — Instantly
AltFrame uses AI to generate accurate, SEO-optimized alt text for any image. Works via API, MCP, or web interface. Perfect for e-commerce, developers, and content teams.
Bulk alt text generation. WCAG compliant. Multilingual support in 9+ languages.
50 free credits every month. No credit card required.
Trusted by developers and teams at
500+
Developers & designers
1M+
Alt texts generated
5+ hrs
Saved per week
Everything you need for image SEO
From single images to bulk pipelines, AltFrame handles it all with AI precision.
AI-Powered Generation
GPT-4.1 vision analyzes every pixel to produce precise, SEO-rich alt text — not generic captions.
Bulk Upload
Process up to 100 images per batch. Drag-and-drop, URL list, or CSV — we handle it all.
API Access
REST API with code examples in cURL, Python, Node.js, and PHP. Integrate in minutes.
Schema Markup
Auto-generate ImageObject schema for every image. Better structured data, better SERP visibility.
Filename Renamer
Rename files to SEO-friendly slugs that match the alt text — no more IMG_4892.jpg.
SEO Optimized
Every description is tuned for keyword relevance, length, and accessibility best practices.
The image API AI agents love
AltFrame works natively with Claude, GPT, Cursor, and any MCP-compatible agent. One API call. Production-ready output.
REST API
5 lines of code. Any language. Any framework.
MCP Server
Install once. Use from Claude Desktop, Cursor, Cline.
OpenAI Functions
Drop-in tool definitions for function calling.
npx @altframe/mcp setup
# or
curl -X POST https://altframe.app/api/v1/generate \
-H "Authorization: Bearer af_live_..." \
-d '{"image_url": "https://example.com/image.jpg"}'How it works
Three steps to perfect image metadata
Upload
Drag-and-drop images, paste a URL, or send them via API.
Generate
AI processes your images and returns alt text in under 3 seconds.
Copy / Export
One-click copy, download CSV, or pull results directly from the API.
Simple, transparent pricing
Start free. Upgrade when you need more.
Loved by developers and marketers
Trusted by 500+ teams to generate alt text at scale.
“AltFrame cut our image optimization time from hours to minutes. The alt text quality is incredible.”
Sarah K.
SEO Manager
“We process 5,000+ product images monthly. The e-commerce mode is a game-changer for our Shopify store.”
Mike T.
E-commerce Director
“The API integration was dead simple. Had it running in our CMS pipeline within 30 minutes.”
Alex R.
Full-Stack Developer
Used by teams at
Frequently asked questions
Everything you need to know about AltFrame.
What is alt text and why does it matter?
Alt text (alternative text) is an HTML attribute that describes an image for screen readers and search engines. It improves web accessibility for visually impaired users and is a key on-page SEO signal — images without good alt text are invisible to Google.
Why use AI to generate alt text?
Writing alt text manually for hundreds or thousands of images is time-consuming and inconsistent. AI analyzes the actual visual content of each image and produces descriptive, keyword-aware alt text in seconds — with consistency at scale that manual writing can't match.
Is AltFrame free to use?
Yes. The Free plan includes 25 credits with no credit card required. You can generate alt text for 25 images at no cost and upgrade to a lifetime deal starting at $49 when you need more.
How accurate is AI-generated alt text?
AltFrame uses GPT-4.1 vision to analyze every pixel of your image. The output is precise, context-aware, and tuned for SEO — not generic captions. You can also customize prompts for brand-specific terminology.
Does AltFrame support bulk alt text generation?
Yes. You can process up to 100 images per batch via drag-and-drop, URL list, CSV upload, or the REST API bulk endpoint. Results can be exported as CSV or pulled via webhook callbacks.
What languages does AltFrame support?
AltFrame generates alt text in 9+ languages including English, Spanish, French, German, Portuguese, Italian, Dutch, Japanese, and Chinese. Each additional translation costs 1 extra credit.
How does AltFrame help with accessibility compliance?
AltFrame generates descriptive, meaningful alt text that follows WCAG 2.1 guidelines. Every description is tuned for screen reader compatibility, helping you meet Section 508, ADA, and EN 301 549 requirements.
Can I use the API in a production pipeline?
Absolutely. All plans include REST API access authenticated with an API key. You can integrate alt text generation into your CMS, CDN upload hook, or build process. Bulk endpoints support up to 100 images per request with optional webhook callbacks.