Publishers have been sending Common Crawl legal opt-out requests. In the interest of transparency and to better serve our ecosystem, we are publishing the full opt-out list for every legal request we have received.

On the 28th and 29th of August 2025, Thom Vaughan, Pedro Ortiz Suarez, and Thijs Dalhuijsen attended the Linux Foundation’s AI_dev event in Amsterdam.

Stanford HAI and Common Crawl are joining forces to explore how open data can shape the future of AI. On 22 October 2025, their seminar will address privacy, safety, and security while showcasing new ways to preserve and share humanity’s knowledge.

We are pleased to release our newsletter for July and August 2025, with updates on our team's activities.

We are pleased to announce a new release of host-level and domain-level web graphs based on the crawls of June, July, and August 2025. The host-level graph consists of 691.1 million nodes and 5.0 billion edges, and the domain-level graph consists of 207.6 million nodes and 3.9 billion edges.

We are pleased to announce the release of our August 2025 crawl, containing 2.44 billion web pages (or 424 TiB of uncompressed content).

The Common Crawl team attended the 63rd Annual Meeting of the Association of Computational Linguistics in Vienna, presenting recent published work and strengthening links with the research community.

Publishers and brands are shifting from SEO to AIO. Many SEOs unknowingly block their sites from AI search by restricting CCBot in robots.txt. As Search 2.0 transforms discovery, ensuring content can train AI models becomes as crucial as traditional SEO.

A report on IETF 123 in Madrid, including sessions on AI content preferences, bot authentication, and web measurement.

Our Web Graph release for July 2025 is now available, consisting of 481.6 million nodes and 3.4 billion edges at the host level, and 209.5 million nodes and 2.6 billion edges at the domain level.

The crawl archive for July 2025 is now available. Crawled between July 7th and July 21st, the data contains 2.42 billion web pages, or 419 TiB of uncompressed content.

The Common Crawl Foundation, MLCommons, EleutherAI, and John Hopkins' Center for Language and Speech Processing have the pleasure of inviting you to register for the 1st shared task on Language Identification for web data.

In June 2025 the Common Crawl Foundation, MLCommons, and EleutherAI had the pleasure of hosting a virtual hackathon in partnership with Masakhane in order to collect language identification annotations for African languages.

We are pleased to announce that the Web Graph for June 2025 is now available. The graph consists of 371.6 million nodes and 3.1 billion edges at the host level, and 161.8 million nodes and 2.2 billion edges at the domain level.

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.

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

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

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

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.

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.

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.

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.

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.

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.

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.

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

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.

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.

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).

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.

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.

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.

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.

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.

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

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.

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

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

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.

The crawl archive for December 2024 is now available. The data was crawled between December 1st and December 15th, and contains 2.64 billion web pages (or 394 TiB of uncompressed content). Page captures are from 47.5 million hosts or 38.3 million registered domains and include 1.05 billion new URLs, not visited in any of our prior crawls.

The Common Crawl Foundation attended NeurIPS 2024, connecting with organisations, hosting a social event on tech and social impact, and showcasing contributions to AI research and data access.

We aim to enhance linguistic diversity in our dataset by inviting community contributions of non-English URLs and collaborating with MLCommons on a Language Identification campaign.

We’re pleased to announce this month's newsletter, featuring key updates, upcoming events, and community highlights.

We are pleased to announce a new release of host-level and domain-level Web Graphs based on the crawls of September, October, and November 2024. The crawls used to generate the graphs were CC-MAIN-2024-46, CC-MAIN-2024-42, and CC-MAIN-2024-38.

The crawl archive for November 2024 is now available. The data was crawled between November 1st and November 15th, and contains 2.68 billion web pages (or 405 TiB of uncompressed content). Page captures are from 47.5 million hosts or 38.3 million registered domains and include 1 billion new URLs, not visited in any of our prior crawls.

Thom Vaughan and Pedro Ortiz Suarez discussed the power of Common Crawl’s open web data in driving research and innovation during two notable presentations last week.

As part of our commitment to accuracy and transparency, we are pleased to introduce a new Errata page on our website.

We are pleased to announce a new release of host-level and domain-level Web Graphs based on the crawls of August, September, and October 2024. The crawls used to generate the graphs were CC-MAIN-2024-33, CC-MAIN-2024-38, and CC-MAIN-2024-42.

The data was crawled between October 3rd and October 16th, and contains 2.49 billion web pages (or 365 TiB of uncompressed content). Page captures are from 47.5 million hosts or 38.3 million registered domains and include 1.03 billion new URLs, not visited in any of our prior crawls.

We recently had the honor of briefing the White House Office of Science and Technology Policy (OSTP) on the role of The Common Crawl Foundation as critical infrastructure in the artificial intelligence ecosystem and how we can support U.S. federal efforts in advancing responsible AI use and research.

Earlier this month, the Common Crawl Foundation had the privilege of participating in a groundbreaking workshop hosted by the Internet Architecture Board (IAB) in Washington DC.

We are pleased to announce a new release of host-level and domain-level web graphs based on the crawls of July, August, and September 2024. The crawls used to generate the graphs were CC-MAIN-2024-30, CC-MAIN-2024-33, and CC-MAIN-2024-38.

The crawl archive for September 2024 is now available. The data was crawled between September 7th and September 21st 2024, and contains 2.8 billion web pages (or 410 TiB of uncompressed content).

We're pleased to announce our newsletter for August and September 2024.

We are pleased to announce a new release of host-level and domain-level web graphs based on the crawls of June, July, August 2024. The crawls used to generate the graphs were CC-MAIN-2024-33, CC-MAIN-2024-30, and CC-MAIN-2024-26.

The crawl archive for August 2024 is now available. The data was crawled between August 3rd and August 16th, and contains 2.3 billion web pages (or 327.4 TiB of uncompressed content).

Common Crawl's impact on research has grown substantially since its beginning. Our crawls have become a vital resource for researchers in various fields, from natural language processing to red teaming.

We are pleased to announce a new release of host-level and domain-level Web Graphs based on the crawls of May, June, and July 2024.

We are pleased to announce that the crawl archive for July 2024 is now available, containing 2.5 billion web pages, or 360 TiB of uncompressed content.

We're excited to announce that Common Crawl’s statistics are now available on Hugging Face!

Looking at tools (Green Software) and methodologies to evaluate the environmental impact of the cloud (a nascent activity coined GreenOps).

We are pleased to announce a new release of host-level and domain-level web graphs based on the crawls of April, May, June 2024. The crawls used to generate the graphs were CC-MAIN-2024-18, CC-MAIN-2024-22, and CC-MAIN-2024-26.

The crawl archive for June 2024 is now available. The data was crawled between June 12th and June 26th, and contains 2.7 billion web pages (or 382 TiB of uncompressed content). Page captures are from 52.7 million hosts or 41.4 million registered domains and include 945 million new URLs, not visited in any of our prior crawls.

This month members from the Common Crawl Foundation attended the AI_dev: Open Source GenAI & ML Summit in Paris, where discussions focused on AI advancements, ethics, and Open Source solutions.

We’re pleased to share our newsletter for May/June 2024, featuring the latest updates, events, and highlights from our community.

We are pleased to announce a new release of host-level and domain-level web graphs based on the crawls of February, April, and May 2024.

The crawl archive for May 2024 is now available. The data was crawled between May 18th and May 31st, and contains 2.7 billion web pages (or 377 TiB of uncompressed content). This is our 100th crawl!

We are pleased to announce a new release of host-level and domain-level web graphs based on the crawls of November, February, April 2024.

We are pleased to announce that the crawl archive for April 2024 is now available. The data was crawled between April 12th and April 25th, and contains 2.7 billion web pages (or 386 TiB of uncompressed content). Page captures are from 47.24 million hosts or 37.65 million registered domains and include 0.98 billion new URLs not visited in any of our prior crawls.

We're excited to share an update on some of our recent projects and initiatives in this newsletter!

We are pleased to announce a new release of host-level and domain-level web graphs based on the crawls of September, November, February 2023-24.

The crawl archive for February/March 2024 is now available. The data was crawled between February 20th and March 5th, and contains 3.16 billion web pages (or 424.7 TiB of uncompressed content).

In the ever–evolving landscape of digital archiving and data analysis, it is helpful to understand the various file formats used for web crawling. From the early ARC format to the more advanced WARC, and the specialised WET and WAT files, each plays an important role in the field of web archiving. In this post, we explain these formats, exploring their unique features, applications, and the enhancements they offer.

This post details some experiments that we have done regarding Machine Learning Opt–Out protocols. We decided to investigate the prevalence of some of these protocols, by taking a deeper look at our WARC files, and finding which proportions of domains are using which opt–out protocols.

What opt–out protocols are, their importance, how you can use them, how we respect them, and what the emerging initiatives are that surround them.

We are pleased to announce a new release of host-level and domain-level web graphs based on the crawls of May, September, and November of 2023.

The crawl archive for November/December 2023 is now available. The data was crawled between November 28th and December 12th, and contains 3.35 billion web pages (or 454 TiB of uncompressed content).

Our datasets have become very popular over time, with downloads doubling every 6 months for several years in a row. This post details some steps to take if you are impacted by performance issues.

We are pleased to announce a new release of host-level and domain-level web graphs based on the crawls of March, May, and October 2023. The host-level graph consists of 378.7 million nodes and 2.6 billion edges, and the domain-level graph has 94.2 million nodes and 1.7 billion edges.

The crawl archive for September/October 2023 is now available! The data was crawled Sept 21 – October 5 and contains 3.4 billion web pages or 456 TiB of uncompressed content.

This month Common Crawl Foundation members had the privilege of attending 5th International Open Search Symposium at CERN in Geneva, Switzerland.

The crawl archive for May/June 2023 is now available! The data was crawled May 27 – June 11 and contains 3.1 billion web pages or 390 TiB of uncompressed content. Page captures are from 44 million hosts or 35 million registered domains and include 1.0 billion new URLs, not visited in any of our prior crawls.

The crawl archive for March/April 2023 is now available! The data was crawled March 20 – April 2 and contains 3.1 billion web pages or 400 TiB of uncompressed content. Page captures are from 43 million hosts or 34 million registered domains and include 1.2 billion new URLs, not visited in any of our prior crawls.

We are pleased to announce a new release of host-level and domain-level web graphs based on the September/October, November/December 2022 and January/February 2023 crawls. For more information about the data formats and the processing pipeline, please see the announcements of previous webgraph releases.

The crawl archive for January/February 2023 is now available! The data was crawled January 26 – February 9 and contains 3.15 billion web pages or 400 TiB of uncompressed content. Page captures are from 40 million hosts or 33 million registered domains and include 1.3 billion new URLs, not visited in any of our prior crawls.

The crawl archive for September/October 2022 is now available! The data was crawled September 24 – October 8 and contains 3.15 billion web pages or 380 TiB of uncompressed content. Page captures are from 44 million hosts or 34 million registered domains and include 1.3 billion new URLs, not visited in any of our prior crawls. This crawl includes improvements made in extracting clean text in WET files and WAT anchor texts.

We are pleased to announce a new release of host-level and domain-level web graphs based on the crawls of February/March, April and May 2021. Additional information about the data formats, the processing pipeline, our objectives, and credits can be found in the announcements of prior webgraph releases.

The crawl archive for November/December 2022 is now available! The data was crawled November 26 – December 10 and contains 3.35 billion web pages or 420 TiB of uncompressed content. Page captures are from 44 million hosts or 34 million registered domains and include 1.2 billion new URLs, not visited in any of our prior crawls.

The crawl archive for June/July 2022 is now available! The data was crawled June 24 – July 7 and contains 3.1 billion web pages or 370 TiB of uncompressed content. Page captures are from 44 million hosts or 35 million registered domains and include 1.4 billion new URLs, not visited in any of our prior crawls.

We are pleased to announce a new release of host-level and domain-level web graphs based on the crawls of May, June/July and August 2022. Additional information about the data formats, the processing pipeline, our objectives, and credits can be found in the announcements of prior webgraph releases.

The crawl archive for August 2022 is now available! The data was crawled August 7 – 20 and contains 2.55 billion web pages or 295 TiB of uncompressed content. Page captures are from 46 million hosts or 37 million registered domains and include 1.3 billion new URLs, not visited in any of our prior crawls.

The crawl archive for July/August 2021 is now available! The data was crawled July 23 – August 6 and contains 3.15 billion web pages or 360 TiB of uncompressed content. It includes page captures of 1 billion new URLs, not visited in any of our prior crawls.

The crawl archive for May 2022 is now available! The data was crawled May 16 – 29 and contains 3.45 billion web pages or 420 TiB of uncompressed content. Page captures are from 45 million hosts or 36 million registered domains and include 1.4 billion new URLs, not visited in any of our prior crawls.

We are pleased to announce a new release of host-level and domain-level web graphs based on the crawls of October, November/December 2021 and January 2022. Additional information about the data formats, the processing pipeline, our objectives, and credits can be found in the announcements of prior webgraph releases.

The crawl archive for January 2022 is now available! The data was crawled January 16 – 29 and contains 2.95 billion web pages or 320 TiB of uncompressed content. It includes page captures of 1.35 billion new URLs, not visited in any of our prior crawls.

Ten years ago(!) Common Crawl joined AWS’s Open Data Sponsorships program, hosted on S3, with free access to everyone. Since then, the dataset has expanded (by petabytes!) and our community of users has seen extraordinary growth.

The crawl archive for November/December 2021 is now available! The data was crawled Nov 26 – Dec 9 and contains 2.5 billion web pages or 280 TiB of uncompressed content. It includes page captures of 1.2 billion new URLs, not visited in any of our prior crawls.

The crawl archive for October 2021 is now available! The data was crawled Oct 15 – 28 and contains 3.3 billion web pages or 360 TiB of uncompressed content. It includes page captures of 1.3 billion new URLs, not visited in any of our prior crawls.

We are pleased to announce a new release of host-level and domain-level web graphs based on the crawls of June, July/August and September 2021. Additional information about the data formats, the processing pipeline, our objectives, and credits can be found in the announcements of prior webgraph releases.

The crawl archive for September 2021 is now available! The data was crawled Sept 16 – 29 and contains 2.95 billion web pages or 310 TiB of uncompressed content. It includes page captures of 1.3 billion new URLs, not visited in any of our prior crawls.