Analyze Any Web Page
with AI Vision
Capture a pixel-perfect screenshot and analyze it with OpenAI GPT-4 Vision in a single API call. Extract content, audit accessibility, monitor competitors, and automate visual QA -- all without building a pipeline.
No credit card required — free tier included
{
"layout": "Hero + 3-col grid",
"primary_cta": "Get Started",
"colors": "Blue primary, white bg",
"accessibility": {
"contrast": "Good",
"issues": 2
},
"seo_score": 87
}How AI Vision Web Page Analysis Works
Three steps. One API call. Structured AI insights returned in seconds.
Capture
We render the target URL in a real Chromium browser. Full JavaScript execution, lazy-load scrolling, ad blocking, and cookie banner removal -- all handled automatically.
Analyze
The screenshot is sent directly to OpenAI GPT-4 Vision with your custom prompt. No intermediate storage. No extra uploads. It happens within the same request pipeline.
Receive
Get a structured JSON response containing the AI analysis text, token usage, and optional screenshot URL. Parse and integrate the results into your workflow instantly.
What AI Can See on Any Web Page
GPT-4 Vision interprets screenshots the way a human would -- but faster, at scale, and with structured output. Here is what you can analyze.
Analyze a Website with AI in One API Call
Pass your OpenAI API key and a custom prompt. We handle the rest.
curl "https://api.nodium.io/api/v1/screenshot/take" \
-H "X-Access-Key: YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"url": "https://example.com",
"format": "png",
"response_type": "json",
"openai_api_key": "sk-...",
"openai_prompt": "Analyze this webpage. Describe the layout, identify the main CTA, and list any accessibility issues.",
"openai_max_tokens": 1000
}'{
"screenshot_url": "https://cdn.nodium.io/s/abc123.png",
"ai_analysis": "The page uses a centered hero layout with a bold headline, a subtitle paragraph, and two CTA buttons (primary: 'Get Started', secondary: 'Learn More'). Below the fold, three feature cards are displayed in a responsive grid. Accessibility issues: (1) The secondary CTA has a contrast ratio of 3.2:1, below the WCAG AA minimum of 4.5:1. (2) Two images are missing alt attributes.",
"ai_tokens_used": 487,
"credits_used": 3
}const response = await fetch("https://api.nodium.io/api/v1/screenshot/take", {
method: "POST",
headers: {
"X-Access-Key": process.env.NODIUM_API_KEY,
"Content-Type": "application/json",
},
body: JSON.stringify({
url: "https://example.com",
format: "png",
response_type: "json",
openai_api_key: process.env.OPENAI_API_KEY,
openai_prompt: "Analyze this webpage for accessibility issues.",
openai_max_tokens: 1000,
}),
});
const data = await response.json();
console.log(data.ai_analysis);import requests
response = requests.post(
"https://api.nodium.io/api/v1/screenshot/take",
headers={"X-Access-Key": "YOUR_API_KEY"},
json={
"url": "https://example.com",
"format": "png",
"response_type": "json",
"openai_api_key": "sk-...",
"openai_prompt": "Describe the page layout and list all CTAs.",
"openai_max_tokens": 1000,
},
)
data = response.json()
print(data["ai_analysis"])AI Screenshot Analysis Use Cases
From visual QA to competitive intelligence, GPT-4 Vision web analysis unlocks workflows that were previously impossible to automate.
Example prompt
"Compare these two screenshots and list every visual difference, including layout shifts, missing elements, and style changes."
Example prompt
"Analyze the SEO quality of this page: heading hierarchy, keyword usage in visible text, CTA placement, and content structure."
Example prompt
"Evaluate this page for WCAG 2.1 AA accessibility issues. Check contrast, text sizing, interactive element spacing, and navigation clarity."
Example prompt
"Extract all pricing information, plan names, feature lists, and promotional offers visible on this page."
Why Nodium for AI Vision Web Analysis
Other approaches require you to capture a screenshot, upload it to cloud storage, then send it to OpenAI. With Nodium, it is a single API call.
One API Call
No need to build a pipeline of screenshot capture, file upload, and OpenAI requests. One POST request does everything.
Your OpenAI Key
You provide your own OpenAI API key. You control costs, rate limits, and model access. We never store your key.
Custom Prompts
Send any prompt you want. Analyze for accessibility, extract pricing data, describe layouts -- the analysis is entirely yours to define.
Batch Processing
Combine AI vision with our bulk screenshot API to analyze hundreds of pages in parallel. Perfect for large-scale audits.
Any Input Source
Works with any URL, raw HTML, or Markdown. Analyze live pages, staging environments, or dynamically generated content.
Full Page Rendering
Real Chromium browser with JavaScript execution, lazy-load handling, ad blocking, and cookie banner removal before analysis.
AI Vision Pricing
AI Vision analysis adds 2 extra credits per request on top of the standard screenshot cost. You provide your own OpenAI API key, so you pay OpenAI directly for token usage at their standard rates.
Frequently Asked Questions
Everything you need to know about AI vision web page analysis with Nodium.
What AI models are supported for screenshot analysis?
How much does AI vision analysis cost?
Can I use a custom prompt for the analysis?
What is the maximum response length?
Can I analyze screenshots in batch?
Is my OpenAI API key stored?
How accurate is the AI analysis?
Can I use AI vision for continuous monitoring?
Start Analyzing Web Pages with AI
Capture, analyze, and extract insights from any web page in a single API call. Sign up free and make your first AI-powered screenshot analysis in under a minute.
Free tier included — no credit card required