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Crawl4AI is a Python web crawler purpose-built for AI pipelines and RAG systems. Unlike traditional scrapers (Scrapy, BeautifulSoup, Selenium), it outputs clean markdown or structured JSON directly usable by LLMs, handles JavaScript via Playwright, runs asynchronously for speed (up to 6x faster in benchmarks), and supports features like prefetch mode for link-only crawls, BFS deep crawl with resumable state after crashes, and LLM-powered semantic extraction using Pydantic schemas. Trade-offs include Python-only support, API key requirements for LLM features, and potential rate limiting. It's open source and installable via pip.

The Fastest Python Scraper for RAG? (Crawl4AI)

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