How do you extract structured data from unstructured HTML?

HTML has tags but no consistent schema across sites. A price might be in <span class="price"> or plain text. Converting to requires identifying and extracting data systematically.

Selector-based extraction is brittle—site redesigns break it. Schema-based AI extraction defines what you want, not where to find it:

result = app.scrape_url("https://example.com/product", {
    "formats": ["extract"],
    "extract": {
        "schema": {
            "type": "object",
            "properties": {
                "productName": {"type": "string"},
                "price": {"type": "number"}
            }
        }
    }
})

The AI understands "price" conceptually, not by CSS class names. Sites change HTML; extraction keeps working.

Key Takeaways

Selector-based extraction requires per-site maintenance. Olostep's AI-powered extraction understands content semantically, delivering structured JSON from any page without brittle selectors.