How to Extract Structured Data From Websites With an LLM (2026)

Browser Use published a guide to extracting structured JSON from websites with an LLM, comparing Firecrawl, Crawl4AI, Browser Use and Stagehand.

Its recommended starting point is one reusable JSON Schema. Fetch clean page text for static pages, and use a browser agent when a site needs logins, clicks or a JavaScript flow.

Validate every record in code, retry or flag failures, and keep the source URL with the result. Missing values should be null rather than guesses. The guide also recommends rate limits, following robots.txt and site terms, and spot-checking results against live pages.