Crawl4AI - LLM-Ready Web Crawler¶

84K+ stars · Python · updated daily · Verified Sep 25, 2026

Open-source web crawler and scraper built for LLMs and AI agents: any website into clean, LLM-ready Markdown. Run it yourself, or use Crawl4AI Cloud with one key.

What it does¶

Turns HTML pages into clean Markdown stripped of nav, ads, and boilerplate
Handles JavaScript-rendered sites
Extracts structured data, tables, links, and metadata
Fast batching for multi-page crawls
Ships an MCP server so coding agents can crawl directly

Install¶

pip install crawl4ai
crawl4ai-setup   # installs browser dependencies

Cloud option: one API key, no local browser install.

Integration with CorpusIQ¶

Research sweeps, competitor censuses, and ecosystem discovery all need bulk page extraction into clean text. Crawl4AI is the self-hosted, high-throughput option for those lanes, complementing the stealth browser for captcha-walled targets and Firecrawl-style APIs for one-off fetches.

Source¶

GitHub: unclecode/crawl4ai
Docs: docs.crawl4ai.com