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OSCON 2012

OSCON 2012

We're just one month away from one of the biggest and most exciting events of the year, O'Reilly's Open Source Convention (OSCON). This year's conference will be held July 16th-20th in Portland, Oregon.
Learn Hadoop and get a paper published

Learn Hadoop and get a paper published

We're looking for students who want to try out the Apache Hadoop platform and get a technical report published.
Big Data Week: meetups in SF and around the world

Big Data Week: meetups in SF and around the world

Big Data Week aims to connect data enthusiasts, technologists, and professionals across the globe through a series of meet-ups. The idea is to build community among groups working on big data and to spur conversations about relevant topics ranging from technology to commercial use cases.
Twelve steps to running your Ruby code across five billion web pages

Twelve steps to running your Ruby code across five billion web pages

The following is a guest blog post by Pete Warden, a member of the Common Crawl Advisory Board. Pete is a British-born programmer living in San Francisco. After spending over a decade as a software engineer, including 5 years at Apple, he’s now focused on a career as a mad scientist.
Web Data Commons

Web Data Commons

For the last few months, we have been talking with Chris Bizer and Hannes Mühleisen at the Freie Universität Berlin about their work and we have been greatly looking forward the announcement of the Web Data Commons.
Common Crawl's Advisory Board

Common Crawl's Advisory Board

As part of our ongoing effort to grow Common Crawl into a truly useful and innovative tool, we recently formed an Advisory Board to guide us in our efforts. We have a stellar line-up of advisory board members who will lend their passion and expertise in numerous fields as we grow our vision.
Video Tutorial: MapReduce for the Masses

Video Tutorial: MapReduce for the Masses

Learn how you can harness the power of MapReduce data analysis against the Common Crawl dataset with nothing more than five minutes of your time, a bit of local configuration, and 25 cents.
Gil Elbaz and Nova Spivack on This Week in Startups

Gil Elbaz and Nova Spivack on This Week in Startups

Nova and Gil, in discussion with host Jason Calacanis, explore in depth what Common Crawl is all about and how it fits into the larger picture of online search and indexing. Underlying their conversation is an exploration of how Common Crawl's open crawl of the web is a powerful asset for educators, researchers, and entrepreneurs.
Video: This Week in Startups - Gil Elbaz and Nova Spivack

Video: This Week in Startups - Gil Elbaz and Nova Spivack

Nova and Gil, in discussion with host Jason Calacanis, explore in depth what Common Crawl is all about and how it fits into the larger picture of online search and indexing.
MapReduce for the Masses: Zero to Hadoop in Five Minutes with Common Crawl

MapReduce for the Masses: Zero to Hadoop in Five Minutes with Common Crawl

Common Crawl aims to change the big data game with our repository of over 40 terabytes of high-quality web crawl information into the Amazon cloud, the net total of 5 billion crawled pages.
Common Crawl Discussion List

Common Crawl Discussion List

We have started a Common Crawl discussion list to enable discussions and encourage collaboration between the community of coders, hackers, data scientists, developers and organizations interested in working with open web crawl data.
Answers to Recent Community Questions

Answers to Recent Community Questions

In this post we respond to the most common questions. Thanks for all the support and please keep the questions coming!
Common Crawl Enters A New Phase

Common Crawl Enters A New Phase

A little under four years ago, Gil Elbaz formed the Common Crawl Foundation. He was driven by a desire to ensure a truly open web. He knew that decreasing storage and bandwidth costs, along with the increasing ease of crunching big data, made building and maintaining an open repository of web crawl data feasible.
Video: Gil Elbaz at Web 2.0 Summit 2011

Video: Gil Elbaz at Web 2.0 Summit 2011

Hear Common Crawl founder discuss how data accessibility is crucial to increasing rates of innovation as well as give ideas on how to facilitate increased access to data.

Common Crawl Blog

Common Crawl at the United Nations Open Source Week, June 2025

June 30, 2025

The Common Crawl Foundation team took part in the United Nations Open Source Week in New York City this June, meeting with global developers, researchers, and policymakers to discuss all things open source and AI.

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June 2025 Crawl Archive Now Available

June 27, 2025

We are pleased to announce that the crawl archive for June 2025 is now available.

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May/June 2025 Newsletter

June 24, 2025

We're happy to share our newsletter for May/June 2025 with updates from our team.

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Announcing the Whirlwind Tour of Common Crawl's Datasets using Python

June 12, 2025

Announcing a refreshed version of the Whirlwind Tour in Python. Get to know how to make the most of our crawl data.

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Host- and Domain-Level Web Graphs March, April, and May 2025

May 29, 2025

We are pleased to announce that the Web Graph for May 2025 is now available. The graph consists of 326.8 million nodes and 2.9 billion edges at the host level, and 156.1 million nodes and 2.1 billion edges at the domain level.

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May 2025 Crawl Archive Now Available

May 28, 2025

We are pleased to announce that the crawl archive for May 2025 is now available. The data was crawled between May 11th and May 25th, and contains 2.47 billion web pages, or 429 TiB of uncompressed content.

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Announcing the First Workshop on Multilingual Data Quality Signals

May 27, 2025

The first Workshop on Multilingual Data Quality Signals (WMDQS), hosted by Common Crawl with MLCommons, EleutherAI, and Johns Hopkins, will be held alongside COLM 2025 on 10 October 2025 in Montreal, Canada. It invites research papers on multilingual data quality and offers a shared task on language identification for web text.

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Host- and Domain-Level Web Graphs February, March, and April 2025

May 5, 2025

We are pleased to announce a new release of host-level and domain-level Web Graphs based on the crawls of February, March, and April 2025. The graph consists of 309.2 million nodes and 2.9 billion edges at the host level, and 157.1 million nodes and 2.1 billion edges at the domain level.

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April 2025 Crawl Archive Now Available

May 4, 2025

Announcing the release of the April 2025 crawl archive. The data was crawled between April 17th and May 1st, and contains 2.74 billion web pages (or 468 TiB of uncompressed content). Page captures are from 47.5 million hosts or 38.8 million registered domains and include 838 million new URLs, not visited in any of our prior crawls.

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Introducing the Host Index

April 23, 2025

Introducing the Host Index: a new dataset with one row per web host per crawl, combining crawl stats, status codes, languages, and bot defence data. Queryable via AWS tools or downloadable.

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IIPC General Assembly & Web Archiving Conference 2025

April 16, 2025

The Common Crawl team attended the 2025 IIPC General Assembly and Web Archiving Conference in Oslo, presenting recent work and participating in discussions on web preservation.

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March/April 2025 Newsletter

April 14, 2025

We're excited to share our newsletter for March/April 2025 with updates from our team.

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Providing Authenticity & Data Provenance for Common Crawl Using Blockchain: Our Work with Constellation Network

April 9, 2025

In 2024, the Common Crawl Foundation and Constellation Network announced a groundbreaking partnership to enhance data integrity and transparency across the web. Here we recap some recent discussions with Constellation.

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Host- and Domain-Level Web Graphs January, February, and March 2025

April 1, 2025

We are pleased to announce a new release of host-level and domain-level Web Graphs based on the crawls of January, February, and March 2025.

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March 2025 Crawl Archive Now Available

April 1, 2025

We are pleased to announce that the crawl archive for March 2025 is now available. The data was crawled between March 15th and March 28th, and contains 2.74 billion web pages (or 455 TiB of uncompressed content).

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Introducing Common Crawl AI Agent by ReadyAI

March 31, 2025

We are pleased to announce the launch of an experimental AI Agent, developed by our friends at ReadyAI. The agent offers a conversational interface designed to help users explore Common Crawl’s data, use cases, and community initiatives.

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Submission to the UK’s Copyright and AI Consultation

March 3, 2025

Read our submission to the UK government's Copyright and AI consultation, supporting a legal exception for text and data mining (TDM) while respecting creators’ rights.

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Host- and Domain-Level Web Graphs December 2024 and January/February 2025

February 25, 2025

Announcing our February 2025 Web Graph release based on the crawls of December 2024 and January/February 2025, consisting of 267.4 million nodes and 2.7 billion edges at the host level, and 106.5 million nodes and 1.9 billion edges at the domain level.

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February 2025 Crawl Archive Now Available

February 23, 2025

The crawl archive for February 2025 is now available. The data was crawled between February 6th and February 20th, and contains 2.6 billion web pages (or 402 TiB of uncompressed content). Page captures are from 47.6 million hosts or 38.5 million registered domains and include 1 billion new URLs, not visited in any of our prior crawls.

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Opening the Gates to Online Safety

February 17, 2025

Last week in Paris, at the AI Action Summit, a coalition of major technology companies and foundations announced the launch of ROOST: Robust Online Open Safety Tools.

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January/February 2025 Newsletter

February 3, 2025

We’re happy to share our January/February 2025 newsletter with updates and insights from the world of open data and web archiving.

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Host- and Domain-Level Web Graphs November/December 2024 and January 2025

February 1, 2025

We are pleased to announce a new release of host-level and domain-level web graphs based on the crawls of November, December 2024 and January 2025. The host-level graph consists of 277.7 million nodes and 2.7 billion edges, and the domain-level graph has 100.8 million nodes and 1.9 billion edges.

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January 2025 Crawl Archive Now Available

January 31, 2025

We're pleased to announce our first crawl of 2025, containing 3.0 billion pages, and 460 TiB uncompressed content.

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Introducing cc-downloader

January 21, 2025

Introducing a command-line tool written in Rust for downloading data from Common Crawl.

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Host- and Domain-Level Web Graphs October, November, and December 2024

December 21, 2024

We are pleased to announce a new release of host-level and domain-level Web Graphs based on the crawls of October, November, and December 2024. The crawls used to generate the graphs were CC-MAIN-2024-42, CC-MAIN-2024-46, and CC-MAIN-2024-51.

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