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unclecode / Crawl4AI
pythontool-use wrappersgpt-4oclaude-sonnet-4-6Verifiedverified
Open-source LLM-friendly web crawler and scraper optimized for RAG.
star67.6k stars·download167.0k/wk·v0.4.247·Apache-2.0
Crawl4AI is an open-source, asynchronous web crawler designed specifically for LLM workflows. It returns clean Markdown, structured data, and chunk-friendly outputs — perfect for feeding into RAG pipelines.
🎯 Use Cases
- RAG Data Collection: Crawl docs and websites into LLM-ready chunks.
- Structured Extraction: Pull tables, JSON-LD, and metadata from pages.
- High-Throughput Scraping: Concurrent, async crawling at scale.
✨ Features
- LLM-optimized Markdown extraction
- Hooks for custom extraction strategies (CSS, XPath, LLM)
- Async crawling with caching
- Headless browser fallback for JS-heavy sites
👍 Pros
- Built specifically for AI workflows, not generic scraping
- Async-first design scales well
- Active and rapidly growing community
👎 Cons & Limitations
- Newer project — fewer recipes than legacy scrapers
- Sites with strong anti-bot defenses still require extra work