Common Crawl maintains a free, open repository of web crawl data that can be used by anyone.

The Common Crawl team attended the 2nd Conference on Language Modeling in Montréal, organizing a workshop, giving invited talks, and strengthening links with the research community.

Malte Ostendorff

Malte is a Senior Research Engineer at Common Crawl, based in Berlin, Germany. He holds a Ph.D. in computer science from the University of Göttingen.

Common Crawl maintains a free, open repository of web crawl data that can be used by anyone.

Common Crawl is a 501(c)(3) non–profit founded in 2007.‍We make wholesale extraction, transformation and analysis of open web data accessible to researchers.

Over 300 billion pages spanning 15 years.

Free and open corpus since 2007.

Cited in over 10,000 research papers.

3–5 billion new pages added each month.

Featured Papers:

Lukas Kriesch, Sebastian Losacker

A geolocated dataset of German news articles

Mostafa Ansar, Anna Sperotto, Ralph Holz

Web Crawl Refusals: Insights From Common Crawl

Jeffrey Knockel, Jakub Dalek, Noura Aljizawi, Mohamed Ahmed, Levi Meletti, and Justin Lau

Banned Books: Analysis of Censorship on Amazon.com

Xian Gong, Paul X. McCarthy, Marian-Andrei Rizoiu, Paolo Boldi

Harmony in the Australian Domain Space

Kevin Saric, Felix Savins, Gowri Sankar Ramachandran, Raja Jurdak, Surya Nepal

Hyperlink Hijacking: Exploiting Erroneous URL Links to Phantom Domains

Zhihong Shao, Peiyi Wang, Qihao Zhu, Runxin Xu, Junxiao Song, Mingchuan Zhang, Y.K. Li, Y. Wu, Daya Guo

DeepSeekMath: Pushing the Limits of Mathematical Reasoning in Open Language Models

Asier Gutiérrez-Fandiño, David Pérez-Fernández, Jordi Armengol-Estapé, David Griol, Zoraida Callejas

esCorpius: A Massive Spanish Crawling Corpus

Marius Løvold Jørgensen, UiT Norges Arktiske Universitet

BacklinkDB: A Purpose-Built Backlink Database Management System

Latest Blog Post:

Common Crawl Foundation at COLM 2025

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Common Crawl is a 501(c)(3) non–profit founded in 2007.
‍
We make wholesale extraction, transformation and analysis of open web data accessible to researchers.