---
id: crawl4ai
version: "0.9.2"
license: Apache-2.0
license_treatment: permissive
maintenance: active
---

# Crawl4AI — 🚀🤖 Crawl4AI: Open-source LLM Friendly Web Crawler & scraper

License: permissive · Maintenance: active · Downloads: 1.8M/mo

## What it is and what it does

Crawl4AI is a web crawler and scraper built to feed data into LLM pipelines, RAG systems, and data extraction workflows. It fetches web pages, executes JavaScript to handle dynamic content, and outputs clean Markdown or structured JSON. The package handles browser automation via Playwright, manages async crawling with connection pooling, and includes intelligent filtering to remove noise from pages before passing them to language models.

The tool is designed for developers who need reliable, controllable web data extraction without API rate limits or vendor lock-in. It supports session management, proxy rotation, custom headers, and CSS/XPath-based schema extraction. Recent releases emphasize security hardening and crash recovery for long-running crawls. The package is actively maintained and widely used (78124 GitHub stars), with a permissive Apache-2.0 license.

Use it for:

- Extract product data, prices, and descriptions from e-commerce sites for price comparison or catalog ingestion
- Build training datasets for fine-tuning LLMs by crawling documentation, blogs, or research repositories
- Monitor competitor websites or news sources by crawling and converting content to Markdown for analysis
- Populate RAG vector stores with fresh web content by crawling and chunking pages into semantic units
- Automate form-filling and multi-step workflows using browser profiles and session persistence
- Deep-crawl entire documentation sites or knowledge bases with crash recovery for fault-tolerant extraction

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Crawl4AI is an async web crawler and scraper that converts web pages into clean, LLM-ready Markdown and structured data, with support for JavaScript execution, browser control, and LLM-driven extraction.

Yes. Crawl4AI is actively maintained, has no known vulnerabilities, and offers a permissive license suitable for production use. Install friction is low for standard environments. The 33 runtime dependencies are typical for a full-featured crawler and include well-established libraries (playwright, lxml, pydantic). It is worth installing if you need reliable web-to-Markdown extraction, LLM-friendly output, or structured scraping without external APIs. Not worth installing if you need a lightweight, minimal-dependency scraper or have no use for browser automation.

## Install

pip install crawl4ai
uv add crawl4ai
poetry add crawl4ai

## Installing Crawl4AI

Before you install: Low friction installation with a pure-Python wheel. Active maintenance: last release 30 days ago, 78124 GitHub stars, and no known vulnerabilities. Requires Python 3.10+. The package has 33 runtime dependencies including playwright for browser control and lxml for parsing, which are standard for web crawling but add some installation complexity.

License in practice: Apache-2.0 permissive license allows commercial use, modification, and distribution with minimal restrictions, making it safe for production and proprietary projects.

Quickstart:

pip install -U crawl4ai
crawl4ai-setup

import asyncio
from crawl4ai import AsyncWebCrawler

async def main():
    async with AsyncWebCrawler() as crawler:
        result = await crawler.arun(url="https://example.com")
        print(result.markdown)

asyncio.run(main())

Requires Python 3.10 or later. Browser binaries (Chromium, Firefox, or WebKit) must be installed via `playwright install` or the post-install `crawl4ai-setup` command.

Verify before relying:

- Whether the 33 runtime dependencies create meaningful bloat or slow installation in constrained environments
- Performance characteristics (speed, memory use) for large-scale crawls or deep crawls with many pages
- Actual LLM extraction accuracy and latency with different LLM providers via unclecode-litellm

## Package facts

- License: Apache-2.0 (permissive)
- Python support: supports_current
- Install friction: low
- Maintenance: active
- Downloads: 1.8M/month (top 5,000 on PyPI)
- Known vulnerabilities: none known

## Tags

web scraper markdown extraction, llm-friendly web crawler, async browser automation scraping, structured data extraction from web, javascript-enabled web crawling, rag pipeline web data extraction, headless browser web scraping, web-scraping, llm-pipeline, async-crawler

[View on SkillFed](https://skillfed.io/packages/crawl4ai) · [View on PyPI](https://pypi.org/project/crawl4ai/)