Schema-First AI Extraction Turns Varied Product Pages Into One JSON Format

Web scrapers often need a separate parser for every site, which becomes hard to maintain as sites change their markup. The article proposes defining the desired data structure once and using an LLM to extract matching JSON from many different pages. A DIY version must handle malformed JSON, pages that return no usable content, truncated long pages, and the difference between missing and empty fields. The author also presents a hosted Actor that performs this workflow and returns a status for each URL, with an example run on a sandbox bookstore page. The piece further suggests running the tool on a weekly schedule to track product changes over time.