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Still time to participate in the Common Crawl code contest

Still time to participate in the Common Crawl code contest

There is still plenty of time left to participate in the Common Crawl code contest! The contest is accepting entries until August 30th, why not spend some time this week playing around with the Common Crawl corpus and then submit your work to the contest?
Strata Conference + Hadoop World

Strata Conference + Hadoop World

This year's Strata Conference teams up with Hadoop World for what promises to be a powerhouse convening in NYC from October 23-25. Check out their full announcement below and secure your spot today.
Mat Kelcey Joins The Common Crawl Advisory Board

Mat Kelcey Joins The Common Crawl Advisory Board

We are excited to announce that Mat Kelcey has joined the Common Crawl Board of Advisors! Mat has been extremely helpful to Common Crawl over the last several months and we are very happy to have him as an official Advisor to the organization.
Common Crawl's Brand Spanking New Video and First Ever Code Contest!

Common Crawl's Brand Spanking New Video and First Ever Code Contest!

At Common Crawl we've been busy recently! After announcing the release of 2012 data and other enhancements, we are now excited to share with you this short video that explains why we here at Common Crawl are working hard to bring web crawl data to anyone who wants to use it.
2012 Crawl Data Now Available

2012 Crawl Data Now Available

I am very happy to announce that Common Crawl has released 2012 crawl data as well as a number of significant enhancements to our example library and help pages.
The Open Cloud Consortium’s Open Science Data Cloud

The Open Cloud Consortium’s Open Science Data Cloud

Common Crawl has started talking with the Open Cloud Consortium (OCC) about working together. If you haven’t already heard of the OCC, it is an awesome nonprofit organization managing and operating cloud computing infrastructure that supports scientific, environmental, medical and health care research.
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

Now Available: Host- and Domain-Level Web Graphs

August 18, 2017

We are pleased to announce the release of host-level and domain-level web graphs based on the published crawls of May, June, and July 2017. These graphs, along with ranked lists of hosts and domains, follow on our first host-level web graph (February, March, April 2017).

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July 2017 Crawl Archive Now Available

July 31, 2017

The crawl archive for July 2017 is now available! The archive contains 2.89 billion+ web pages and over 240 TiB of uncompressed content.

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June 2017 Crawl Archive Now Available

July 4, 2017

The crawl archive for June 2017 is now available! The archive contains 3.16 billion+ web pages and over 260 TiB of uncompressed content.

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May 2017 Crawl Archive Now Available

June 5, 2017

The crawl archive for May 2017 is now available! The archive contains 2.96 billion+ web pages and over 250 TiB of uncompressed content.

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Common Crawl's First In-House Web Graph

May 22, 2017

We are pleased to announce the release of a host-level web graph of recent monthly crawls (February, March, April 2017). The graph consists of 385 million nodes and 2.5 billion edges.

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April 2017 Crawl Archive Now Available

May 9, 2017

The crawl archive for April 2017 is now available! The archive contains 2.94 billion+ web pages and over 250 TiB of uncompressed content.

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March 2017 Crawl Archive Now Available

April 4, 2017

The crawl archive for March 2017 is now available! The archive contains 3.07 billion+ web pages and over 250 TiB of uncompressed content.

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February 2017 Crawl Archive Now Available

March 10, 2017

The crawl archive for February 2017 is now available! The archive contains 3.08 billion+ web pages and over 250 TiB of uncompressed content.

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January 2017 Crawl Archive Now Available

February 1, 2017

The crawl archive for January 2017 is now available! The archive contains more than 3.14 billion web pages and about 250 TiB of uncompressed content.

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December 2016 Crawl Archive Now Available

December 16, 2016

The crawl archive for December 2016 is now available! The archive contains more than 2.85 billion web pages.

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October 2016 Crawl Archive Now Available

November 7, 2016

The crawl archive for October 2016 is now available! The archive contains more than 3.25 billion web pages.

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September 2016 Crawl Archive Now Available

October 7, 2016

The crawl archive for September 2016 is now available! The archive contains more than 1.72 billion web pages.

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News Dataset Available

October 4, 2016

We are pleased to announce the release of a new dataset containing news articles from news sites all over the world.

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Data Sets Containing Robots.txt Files and Non-200 Responses

September 16, 2016

Together with the crawl archive for August 2016 we release two data sets containing robots.txt files and server responses with HTTP status code other than 200 (404s, redirects, etc.) The data may be useful to anyone interested in web science, with various applications in the field.

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August 2016 Crawl Archive Now Available

September 16, 2016

The crawl archive for August 2016 is now available! The archive contains more than 1.61 billion web pages.

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July 2016 Crawl Archive Now Available

August 9, 2016

The crawl archive for July 2016 is now available! The archive contains more than 1.73 billion web pages.

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June 2016 Crawl Archive Now Available

July 14, 2016

The crawl archive for June 2016 is now available! The archive contains more than 1.23 billion web pages.

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May 2016 Crawl Archive Now Available

June 19, 2016

The crawl archive for May 2016 is now available! More than 1.46 billion web pages are in the archive.

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April 2016 Crawl Archive Now Available

May 24, 2016

The crawl archive for April 2016 is now available! More than 1.33 billion webpages are in the archive.

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Welcome, Sebastian!

May 13, 2016

It is a pleasure to officially announce that Sebastian Nagel joined Common Crawl as Crawl Engineer in April. Sebastian brings to Common Crawl a unique blend of experience, skills, knowledge (and enthusiasm!) to complement his role and the organization.

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February 2016 Crawl Archive Now Available

February 29, 2016

As an interim crawl engineer for CommonCrawl, I am pleased to announce that the crawl archive for February 2016 is now available! This crawl archive holds more than 1.73 billion urls.

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November 2015 Crawl Archive Now Available

December 18, 2015

As an interim crawl engineer for CommonCrawl, I am pleased to announce that the crawl archive for November 2015 is now available! This crawl archive is over 151TB in size and holds more than 1.82 billion urls.

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September 2015 Crawl Archive Now Available

November 16, 2015

As an interim crawl engineer for CommonCrawl, I am pleased to announce that the crawl archive for September 2015 is now available! This crawl archive is over 106TB in size and holds more than 1.32 billion urls.

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August 2015 Crawl Archive Available

October 10, 2015

The crawl archive for August 2015 is now available! This crawl archive is over 149TB in size and holds more than 1.84 billion webpages.

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Web Image Size Prediction for Efficient Focused Image Crawling

August 20, 2015

This is a guest blog post by Katerina Andreadou, a research assistant at CERTH, specializing in multimedia analysis and web crawling. In the context of using Web image content for analysis and retrieval, it is typically necessary to perform large-scale image crawling. In our web image crawler setup, we noticed that a serious bottleneck pertains to the fetching of image content, since for each web page a large number of HTTP requests need to be issued to download all included image elements.

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