Crawl4AI Skill - Web Crawler & Scraper
Web Crawling 网页爬虫 | Web Scraping 网页爬取 | LLM 优化输出
智能网页爬虫和爬取工具，支持搜索、全站爬取、动态页面抓取。Free web crawler and scraper with LLM-optimized Markdown output.
核心功能 | Core Features
- 🔍 Web Search 网页搜索 - DuckDuckGo search, 免 API key
- 🕷️ Web Crawling 网页爬虫 - Site crawler, spider, sitemap 识别
- 📝 Web Scraping 网页抓取 - Smart scraper, data extraction
- 📄 LLM-Optimized Output - Fit Markdown, 省 Token 80%
- ⚡ Dynamic Page Scraping - JavaScript 渲染页面爬取
快速开始 | Quick Start
安装 | Installation
pip install crawl4ai-skillWeb Search | 网页搜索
# Search the web with DuckDuckGo
crawl4ai-skill search "python web scraping"Web Scraping | 单页爬取
# Scrape a single web page
crawl4ai-skill crawl https://example.comWeb Crawling | 全站爬虫
# Crawl entire website / spider
crawl4ai-skill crawl-site https://docs.python.org --max-pages 50使用场景 | Use Cases
场景 1：Web Crawler for Documentation | 文档站爬虫
# Crawl documentation site with spider
crawl4ai-skill crawl-site https://docs.fastapi.com --max-pages 100爬虫效果 | Crawler Output:
- ❌ 移除：导航栏、侧边栏、广告
- ✅ 保留：标题、正文、代码块
- 📊 Token：50,000 → 10,000（-80%）
场景 2：Search + Scrape | 搜索+爬取
# Search and scrape top results
crawl4ai-skill search-and-crawl "Vue 3 best practices" --crawl-top 3场景 3：Dynamic Page Scraping | 动态页面抓取
JavaScript 渲染的页面爬取（雪球、知乎等）：
# Scrape JavaScript-heavy pages
crawl4ai-skill crawl https://xueqiu.com/S/BIDU --wait-until networkidle --delay 2命令参考 | Commands
| 命令 Command | 说明 Description |
|---|---|
search <query> | Web search 网页搜索 |
crawl <url> | Web scraping 单页爬取 |
crawl-site <url> | Web crawling 全站爬虫 |
search-and-crawl <query> | Search + scrape 搜索并爬取 |
常用参数 | Common Options
# Web Search 搜索
--num-results 10 # Number of results
# Web Scraping 爬取
--format fit_markdown # Output format
--output result.md # Output file
--wait-until networkidle # Wait strategy for dynamic pages
--delay 2 # Additional wait time (seconds)
--wait-for ".selector" # Wait for specific element
# Web Crawling 爬虫
--max-pages 100 # Max pages to crawl
--max-depth 3 # Max crawl depth输出格式 | Output Formats
fit_markdown（推荐 Recommended）
智能提取，节省 80% Token。Smart extraction, save 80% tokens.
crawl4ai-skill crawl https://example.com --format fit_markdownraw_markdown
保留完整结构。Preserve full structure.
crawl4ai-skill crawl https://example.com --format raw_markdown为什么选择这个爬虫？| Why This Crawler?
✅ 免费爬虫 Free Crawler - 无需 API key，开箱即用 ✅ 智能爬取 Smart Scraper - 自动去噪，提取核心内容 ✅ 全站爬虫 Site Crawler - 支持 sitemap，递归爬取 ✅ 动态爬取 Dynamic Scraping - JavaScript 渲染页面支持 ✅ 搜索集成 Search Integration - DuckDuckGo 搜索内置