Common Crawl

A nonprofit organization providing a free, open repository of web crawl data for research and analysis.

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Common Crawl

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Overview

Common Crawl offers a publicly accessible dataset of web crawl data spanning over 300 billion pages collected since 2007, updated monthly with billions of new pages. The data supports research, machine learning, and web analysis with minimal usage restrictions.

Last updated: Sep 5, 2026

Key Features

Extensive Web Crawl Dataset

Access to over 300 billion web pages collected over 15 years, with 3-5 billion new pages added monthly.

Open and Free Access

Data is freely available to anyone for research and analysis under minimal restrictions to encourage open data use.

CCBot Web Crawler

Uses a Nutch-based crawler with adaptive algorithms to respect website load and robots.txt rules.

Multiple Data Indexes

Includes CDXJ Index, URL Index, and Web Graphs to facilitate different types of data queries and analyses.

Support for Large-Scale Processing

Data stored on Amazon S3 for bulk download and direct Map-Reduce processing in cloud environments like EC2.

Sitemap Protocol Support

Crawler respects sitemap announcements in robots.txt to improve crawl efficiency and coverage.

Politeness and Load Management

Crawler uses adaptive back-off and obeys crawl-delay directives to minimize impact on web servers.

Community and Research Collaboration

Supports academic and industry research with datasets cited in over 10,000 papers and provides community resources.

Pros

Provides one of the largest publicly available web crawl datasets with historical depth.
Free and open access promotes democratization of web data for research and innovation.
Crawler respects web standards like robots.txt and crawl-delay to minimize server impact.
Data is stored in cloud infrastructure enabling scalable processing and integration.
Supports multiple data indexes and formats for flexible querying and analysis.

Cons

No direct user interface; requires technical skills to process and analyze raw crawl data.
Does not crawl entire websites but samples subsets, which may limit completeness for some use cases.
Crawler does not execute JavaScript or use cookies, limiting dynamic content capture.
Rate limits and IP blocking can occur if API usage is too aggressive.
No commercial support or service-level agreements as a nonprofit resource.

Pricing

Common Crawl pricing plans
Plan	Price	Highlights
Free Access	$0	Full access to Common Crawl datasets Monthly updated web crawl data Open usage under minimal restrictions Access via Amazon S3 and APIs

Pricing is collected from the official Common Crawl website and may change. Always confirm with the vendor.

Frequently Asked Questions

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Most recent

No reviews yet. Be the first to share your experience.

Ratings & reviews

No reviews yet. Be the first to share your experience.

Share your experience

Help others decide, your insights matter

Community reviews (0)

Most recent

No reviews yet. Be the first to share your experience.

Key Features

Extensive Web Crawl Dataset

Access to over 300 billion web pages collected over 15 years, with 3-5 billion new pages added monthly.

Open and Free Access

Data is freely available to anyone for research and analysis under minimal restrictions to encourage open data use.

CCBot Web Crawler

Uses a Nutch-based crawler with adaptive algorithms to respect website load and robots.txt rules.

Multiple Data Indexes

Includes CDXJ Index, URL Index, and Web Graphs to facilitate different types of data queries and analyses.

Support for Large-Scale Processing

Data stored on Amazon S3 for bulk download and direct Map-Reduce processing in cloud environments like EC2.

Sitemap Protocol Support

Crawler respects sitemap announcements in robots.txt to improve crawl efficiency and coverage.

Politeness and Load Management

Crawler uses adaptive back-off and obeys crawl-delay directives to minimize impact on web servers.

Community and Research Collaboration

Supports academic and industry research with datasets cited in over 10,000 papers and provides community resources.

Pros

Provides one of the largest publicly available web crawl datasets with historical depth.
Free and open access promotes democratization of web data for research and innovation.
Crawler respects web standards like robots.txt and crawl-delay to minimize server impact.
Data is stored in cloud infrastructure enabling scalable processing and integration.
Supports multiple data indexes and formats for flexible querying and analysis.

Cons

No direct user interface; requires technical skills to process and analyze raw crawl data.
Does not crawl entire websites but samples subsets, which may limit completeness for some use cases.
Crawler does not execute JavaScript or use cookies, limiting dynamic content capture.
Rate limits and IP blocking can occur if API usage is too aggressive.
No commercial support or service-level agreements as a nonprofit resource.

Pricing

Common Crawl pricing plans
Plan	Price	Highlights
Free Access	$0	Full access to Common Crawl datasets Monthly updated web crawl data Open usage under minimal restrictions Access via Amazon S3 and APIs

Pricing is collected from the official Common Crawl website and may change. Always confirm with the vendor.

Common Crawl

Overview

Key Features

Extensive Web Crawl Dataset

Open and Free Access

CCBot Web Crawler

Multiple Data Indexes

Support for Large-Scale Processing

Sitemap Protocol Support

Politeness and Load Management

Community and Research Collaboration

Pros

Cons

Pricing

Featured Video

Frequently Asked Questions

Ratings & reviews

Ratings & reviews

Community reviews (0)

Ratings & reviews

Community reviews (0)

Key Features

Extensive Web Crawl Dataset

Open and Free Access

CCBot Web Crawler

Multiple Data Indexes

Support for Large-Scale Processing

Sitemap Protocol Support

Politeness and Load Management

Community and Research Collaboration

Pros

Cons

Pricing

Featured Video

Frequently Asked Questions

More in Data Extraction

Ratings & reviews

Community reviews (0)

More in Data Extraction