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🔥🕷️ Crawl4AI: LLM Friendly Web Crawler & Scraper

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Crawl4AI simplifies asynchronous web crawling and data extraction, making it accessible for large language models (LLMs) and AI applications. 🆓🌐

New in 0.3.74 ✨

Try it Now!

✨ Play around with this Open In Colab

✨ Visit our Documentation Website

Features ✨

Installation 🛠️

Crawl4AI offers flexible installation options to suit various use cases. You can install it as a Python package or use Docker.

Using pip 🐍

Choose the installation option that best fits your needs:

Basic Installation

For basic web crawling and scraping tasks:

pip install crawl4ai

By default, this will install the asynchronous version of Crawl4AI, using Playwright for web crawling.

👉 Note: When you install Crawl4AI, the setup script should automatically install and set up Playwright. However, if you encounter any Playwright-related errors, you can manually install it using one of these methods:

  1. Through the command line:

    playwright install

  2. If the above doesn't work, try this more specific command:

    python -m playwright install chromium

This second method has proven to be more reliable in some cases.

Installation with Synchronous Version

If you need the synchronous version using Selenium:

pip install crawl4ai[sync]

Development Installation

For contributors who plan to modify the source code:

git clone https://github.com/unclecode/crawl4ai.git
cd crawl4ai
pip install -e .

One-Click Deployment 🚀

Deploy your own instance of Crawl4AI with one click:

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💡 Recommended specs: 4GB RAM minimum. Select "professional-xs" or higher when deploying for stable operation.

The deploy will:

Using Docker 🐳

Crawl4AI is available as Docker images for easy deployment. You can either pull directly from Docker Hub (recommended) or build from the repository.

Option 1: Docker Hub (Recommended)

# Pull and run from Docker Hub (choose one):
docker pull unclecode/crawl4ai:basic    # Basic crawling features
docker pull unclecode/crawl4ai:all      # Full installation (ML, LLM support)
docker pull unclecode/crawl4ai:gpu      # GPU-enabled version

# Run the container
docker run -p 11235:11235 unclecode/crawl4ai:basic  # Replace 'basic' with your chosen version

# In case you want to set platform to arm64
docker run --platform linux/arm64 -p 11235:11235 unclecode/crawl4ai:basic

# In case to allocate more shared memory for the container
docker run --shm-size=2gb -p 11235:11235 unclecode/crawl4ai:basic

Option 2: Build from Repository

# Clone the repository
git clone https://github.com/unclecode/crawl4ai.git
cd crawl4ai

# Build the image
docker build -t crawl4ai:local \
  --build-arg INSTALL_TYPE=basic \  # Options: basic, all
  .

# In case you want to set platform to arm64
docker build -t crawl4ai:local \
  --build-arg INSTALL_TYPE=basic \  # Options: basic, all
  --platform linux/arm64 \
  .

# Run your local build
docker run -p 11235:11235 crawl4ai:local

Quick test (works for both options):

import requests

# Submit a crawl job
response = requests.post(
    "http://localhost:11235/crawl",
    json={"urls": "https://example.com", "priority": 10}
)
task_id = response.json()["task_id"]

# Get results
result = requests.get(f"http://localhost:11235/task/{task_id}")

For advanced configuration, environment variables, and usage examples, see our Docker Deployment Guide.

Quick Start 🚀

import asyncio
from crawl4ai import AsyncWebCrawler

async def main():
    async with AsyncWebCrawler(verbose=True) as crawler:
        result = await crawler.arun(url="https://www.nbcnews.com/business")
        print(result.markdown)

if __name__ == "__main__":
    asyncio.run(main())

Advanced Usage 🔬

Executing JavaScript and Using CSS Selectors

import asyncio
from crawl4ai import AsyncWebCrawler

async def main():
    async with AsyncWebCrawler(verbose=True) as crawler:
        js_code = ["const loadMoreButton = Array.from(document.querySelectorAll('button')).find(button => button.textContent.includes('Load More')); loadMoreButton && loadMoreButton.click();"]
        result = await crawler.arun(
            url="https://www.nbcnews.com/business",
            js_code=js_code,
            css_selector=".wide-tease-item__description",
            bypass_cache=True
        )
        print(result.extracted_content)

if __name__ == "__main__":
    asyncio.run(main())

Using a Proxy

import asyncio
from crawl4ai import AsyncWebCrawler

async def main():
    async with AsyncWebCrawler(verbose=True, proxy="http://127.0.0.1:7890") as crawler:
        result = await crawler.arun(
            url="https://www.nbcnews.com/business",
            bypass_cache=True
        )
        print(result.markdown)

if __name__ == "__main__":
    asyncio.run(main())

Extracting Structured Data without LLM

The JsonCssExtractionStrategy allows for precise extraction of structured data from web pages using CSS selectors.

import asyncio
import json
from crawl4ai import AsyncWebCrawler
from crawl4ai.extraction_strategy import JsonCssExtractionStrategy

async def extract_news_teasers():
    schema = {
        "name": "News Teaser Extractor",
        "baseSelector": ".wide-tease-item__wrapper",
        "fields": [
            {
                "name": "category",
                "selector": ".unibrow span[data-testid='unibrow-text']",
                "type": "text",
            },
            {
                "name": "headline",
                "selector": ".wide-tease-item__headline",
                "type": "text",
            },
            {
                "name": "summary",
                "selector": ".wide-tease-item__description",
                "type": "text",
            },
            {
                "name": "time",
                "selector": "[data-testid='wide-tease-date']",
                "type": "text",
            },
            {
                "name": "image",
                "type": "nested",
                "selector": "picture.teasePicture img",
                "fields": [
                    {"name": "src", "type": "attribute", "attribute": "src"},
                    {"name": "alt", "type": "attribute", "attribute": "alt"},
                ],
            },
            {
                "name": "link",
                "selector": "a[href]",
                "type": "attribute",
                "attribute": "href",
            },
        ],
    }

    extraction_strategy = JsonCssExtractionStrategy(schema, verbose=True)

    async with AsyncWebCrawler(verbose=True) as crawler:
        result = await crawler.arun(
            url="https://www.nbcnews.com/business",
            extraction_strategy=extraction_strategy,
            bypass_cache=True,
        )

        assert result.success, "Failed to crawl the page"

        news_teasers = json.loads(result.extracted_content)
        print(f"Successfully extracted {len(news_teasers)} news teasers")
        print(json.dumps(news_teasers[0], indent=2))

if __name__ == "__main__":
    asyncio.run(extract_news_teasers())

For more advanced usage examples, check out our Examples section in the documentation.

Extracting Structured Data with OpenAI

import os
import asyncio
from crawl4ai import AsyncWebCrawler
from crawl4ai.extraction_strategy import LLMExtractionStrategy
from pydantic import BaseModel, Field

class OpenAIModelFee(BaseModel):
    model_name: str = Field(..., description="Name of the OpenAI model.")
    input_fee: str = Field(..., description="Fee for input token for the OpenAI model.")
    output_fee: str = Field(..., description="Fee for output token for the OpenAI model.")

async def main():
    async with AsyncWebCrawler(verbose=True) as crawler:
        result = await crawler.arun(
            url='https://openai.com/api/pricing/',
            word_count_threshold=1,
            extraction_strategy=LLMExtractionStrategy(
                provider="openai/gpt-4o", api_token=os.getenv('OPENAI_API_KEY'), 
                schema=OpenAIModelFee.schema(),
                extraction_type="schema",
                instruction="""From the crawled content, extract all mentioned model names along with their fees for input and output tokens. 
                Do not miss any models in the entire content. One extracted model JSON format should look like this: 
                {"model_name": "GPT-4", "input_fee": "US$10.00 / 1M tokens", "output_fee": "US$30.00 / 1M tokens"}."""
            ),            
            bypass_cache=True,
        )
        print(result.extracted_content)

if __name__ == "__main__":
    asyncio.run(main())

Session Management and Dynamic Content Crawling

Crawl4AI excels at handling complex scenarios, such as crawling multiple pages with dynamic content loaded via JavaScript. Here's an example of crawling GitHub commits across multiple pages:

import asyncio
import re
from bs4 import BeautifulSoup
from crawl4ai import AsyncWebCrawler

async def crawl_typescript_commits():
    first_commit = ""
    async def on_execution_started(page):
        nonlocal first_commit 
        try:
            while True:
                await page.wait_for_selector('li.Box-sc-g0xbh4-0 h4')
                commit = await page.query_selector('li.Box-sc-g0xbh4-0 h4')
                commit = await commit.evaluate('(element) => element.textContent')
                commit = re.sub(r'\s+', '', commit)
                if commit and commit != first_commit:
                    first_commit = commit
                    break
                await asyncio.sleep(0.5)
        except Exception as e:
            print(f"Warning: New content didn't appear after JavaScript execution: {e}")

    async with AsyncWebCrawler(verbose=True) as crawler:
        crawler.crawler_strategy.set_hook('on_execution_started', on_execution_started)

        url = "https://github.com/microsoft/TypeScript/commits/main"
        session_id = "typescript_commits_session"
        all_commits = []

        js_next_page = """
        const button = document.querySelector('a[data-testid="pagination-next-button"]');
        if (button) button.click();
        """

        for page in range(3):  # Crawl 3 pages
            result = await crawler.arun(
                url=url,
                session_id=session_id,
                css_selector="li.Box-sc-g0xbh4-0",
                js=js_next_page if page > 0 else None,
                bypass_cache=True,
                js_only=page > 0
            )

            assert result.success, f"Failed to crawl page {page + 1}"

            soup = BeautifulSoup(result.cleaned_html, 'html.parser')
            commits = soup.select("li")
            all_commits.extend(commits)

            print(f"Page {page + 1}: Found {len(commits)} commits")

        await crawler.crawler_strategy.kill_session(session_id)
        print(f"Successfully crawled {len(all_commits)} commits across 3 pages")

if __name__ == "__main__":
    asyncio.run(crawl_typescript_commits())

This example demonstrates Crawl4AI's ability to handle complex scenarios where content is loaded asynchronously. It crawls multiple pages of GitHub commits, executing JavaScript to load new content and using custom hooks to ensure data is loaded before proceeding.

For more advanced usage examples, check out our Examples section in the documentation.

</details>

Speed Comparison 🚀

Crawl4AI is designed with speed as a primary focus. Our goal is to provide the fastest possible response with high-quality data extraction, minimizing abstractions between the data and the user.

We've conducted a speed comparison between Crawl4AI and Firecrawl, a paid service. The results demonstrate Crawl4AI's superior performance:

Firecrawl:
Time taken: 7.02 seconds
Content length: 42074 characters
Images found: 49

Crawl4AI (simple crawl):
Time taken: 1.60 seconds
Content length: 18238 characters
Images found: 49

Crawl4AI (with JavaScript execution):
Time taken: 4.64 seconds
Content length: 40869 characters
Images found: 89

As you can see, Crawl4AI outperforms Firecrawl significantly:

You can find the full comparison code in our repository at docs/examples/crawl4ai_vs_firecrawl.py.

Documentation 📚

For detailed documentation, including installation instructions, advanced features, and API reference, visit our Documentation Website.

Crawl4AI Roadmap 🗺️

For detailed information on our development plans and upcoming features, check out our Roadmap.

Advanced Crawling Systems 🔧

Specialized Features 🛠️

Development Tools 🔨

Community & Growth 🌱

Contributing 🤝

We welcome contributions from the open-source community. Check out our contribution guidelines for more information.

License 📄

Crawl4AI is released under the Apache 2.0 License.

Contact 📧

For questions, suggestions, or feedback, feel free to reach out:

Happy Crawling! 🕸️🚀

Mission

Our mission is to unlock the untapped potential of personal and enterprise data in the digital age. In today's world, individuals and organizations generate vast amounts of valuable digital footprints, yet this data remains largely uncapitalized as a true asset.

Our open-source solution empowers developers and innovators to build tools for data extraction and structuring, laying the foundation for a new era of data ownership. By transforming personal and enterprise data into structured, tradeable assets, we're creating opportunities for individuals to capitalize on their digital footprints and for organizations to unlock the value of their collective knowledge.

This democratization of data represents the first step toward a shared data economy, where willing participation in data sharing drives AI advancement while ensuring the benefits flow back to data creators. Through this approach, we're building a future where AI development is powered by authentic human knowledge rather than synthetic alternatives.

Mission Diagram

For a detailed exploration of our vision, opportunities, and pathway forward, please see our full mission statement.

Key Opportunities

Development Pathway

  1. Open-Source Foundation: Building transparent, community-driven data extraction tools
  2. Data Capitalization Platform: Creating tools to structure and value digital assets
  3. Shared Data Marketplace: Establishing an economic platform for ethical data exchange

For a detailed exploration of our vision, challenges, and solutions, please see our full mission statement.

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