Common Crawl

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Common Crawl
Type 501(c)(3) non-profit
Founded 2007 (2007)
Headquarters San Francisco, California, USA; Los Angeles, California, USA
Founder(s) Gil Elbaz
Key people Peter Norvig, Nova Spivack, Carl Malamud, Kurt Bollacker Joi Ito
Available in English

Common Crawl is a nonprofit 501(c)(3) organization that crawls the web and freely provides its archives and datasets to the public.[1][2] Common Crawl's web archive consists of hundreds of terabytes of data from several billion webpages.[3] It completes four crawls a year.[4]

Common Crawl was founded in 2007 by Gil Elbaz.[5] Advisors to the non-profit include Peter Norvig and Joi Ito.[3] The organization's crawlers respect nofollow and robots.txt policies. Open source code for processing Common Crawl's data set is publicly available.


Amazon Web Services began hosting Common Crawl's archive through its Public Data Sets program in 2012.[6]

The organization began releasing metadata files and the text output of the crawlers alongside .arc files in July of that year.[7] Common Crawl's archives had only included .arc files previously.[7]

In December 2012, blekko donated to Common Crawl search engine metadata blekko gathered from crawls it conducted from February to October 2012.[8] The donated data helped Common Crawl "improve its crawl while avoiding spam, porn and the influence of excessive SEO."[8]

In 2013, Common Crawl began using Apache Software Foundation's Nutch webcrawler instead of a custom crawler.[9] Common Crawl switched from using .arc files to .warc files with its November 2013 crawl.[10]

Norvig Web Data Science Award[edit]

In corroboration with SURFsara, Common Crawl sponsors the Norvig Web Data Science Award, a competition open to students and researchers in Benelux.[11][12] The award is named for Peter Norvig who also chairs the judging committee for the award.[11]


  1. ^ Rosanna Xia (February 5, 2012). "Tech entrepreneur Gil Elbaz made it big in L.A.". Los Angeles Times. Retrieved July 31, 2014. 
  2. ^ "Gil Elbaz and Common Crawl". NBC News. April 4, 2013. Retrieved July 31, 2014. 
  3. ^ a b Tom Simonite (January 23, 2013). "A Free Database of the Entire Web May Spawn the Next Google". MIT Technology Review. Retrieved July 31, 2014. 
  4. ^ Russell Brandom (March 1, 2013). "Common Crawl: going after Google on a non-profit budget". Retrieved July 31, 2014. 
  5. ^ "Startups - Gil Elbaz and Nova Spivack of Common Crawl - TWiST #222". This Week In Startups. January 10, 2012. 
  6. ^ Jennifer Zaino (March 13, 2012). "Common Crawl To Add New Data In Amazon Web Services Bucket". Semantic Web. Retrieved July 31, 2014. 
  7. ^ a b Jennifer Zaino (July 16, 2012). "Common Crawl Corpus Update Makes Web Crawl Data More Efficient, Approachable For Users To Explore". Semantic Web. Retrieved July 31, 2014. 
  8. ^ a b Jennifer Zaino (December 18, 2012). "Blekko Data Donation Is A Big Benefit To Common Crawl". Semantic Web. Retrieved July 31, 2014. 
  9. ^ Jordan Mendelson (February 20, 2014). "Common Crawl's Move to Nutch". Common Crawl. Retrieved July 31, 2014. 
  10. ^ Jordan Mendelson (November 27, 2013). "New Crawl Data Available!". Common Crawl. Retrieved July 31, 2014. 
  11. ^ a b Lisa Green (November 15, 2012). "The Norvig Web Data Science Award". Common Crawl. Retrieved July 31, 2014. 
  12. ^ "Norvig Web Data Science Award 2014". Dutch Techcentre for Life Sciences. Retrieved July 31, 2014. 

External links[edit]