Crawl4AI

Crawl4AI is a free Python crawler designed to turn web pages into clean markdown for language models. It handles JavaScript-heavy sites, extracts structured data and runs asynchronously for speed.

It is popular with developers building RAG systems who want an alternative to paid scraping APIs. You can run it locally or in Docker.

There is no hosted support, so you manage proxies and scaling yourself. For many small and medium projects, that is a fair price for a free tool.