crawl4ai: Open-source LLM Friendly Web Crawler & Scrapper
Crawl4AI
Crawl4AI simplifies asynchronous web crawling and data extraction, making it accessible for large language models (LLMs) and AI applications.
Feature
- 🆓 Completely free and open-source
- 🚀 Blazing fast performance, outperforming many paid services
- 🤖 LLM-friendly output formats (JSON, cleaned HTML, markdown)
- 🌍 Supports crawling multiple URLs simultaneously
- 🎨 Extracts and returns all media tags (Images, Audio, and Video)
- 🔗 Extracts all external and internal links
- 📚 Extracts metadata from the page
- 🔄 Custom hooks for authentication, headers, and page modifications before crawling
- 🕵️ User-agent customization
- 🖼️ Takes screenshots of the page
- 📜 Executes multiple custom JavaScripts before crawling
- 📊 Generates structured output without LLM using JsonCssExtractionStrategy
- 📚 Various chunking strategies: topic-based, regex, sentence, and more
- 🧠 Advanced extraction strategies: cosine clustering, LLM, and more
- 🎯 CSS selector support for precise data extraction
- 📝 Passes instructions/keywords to refine extraction
- 🔒 Proxy support for enhanced privacy and access
- 🔄 Session management for complex multi-page crawling scenarios
- 🌐 Asynchronous architecture for improved performance and scalability
- 🌐 Multi-browser support (Chromium, Firefox, WebKit)
- 🖼️ Improved image processing with lazy-loading detection
- 🔧 Custom page timeout parameter for better control over crawling behavior
- 🕰️ Enhanced handling of delayed content loading
- 🔑 Custom headers support for LLM interactions
- 🖼️ iframe content extraction for comprehensive page analysis
- ⏱️ Flexible timeout and delayed content retrieval options
