We are proud to release an interactive visualization of thousands of research papers using or citing Common Crawl data.

We are excited to announce the release of CommonLID, a language identification benchmark for the web, covering 109 languages. CommonLID was developed in collaboration with multiple open-source organizations and language community groups.

The latest Web Graphs from the November and December 2025 and January 2026 crawls are now available, comprising 279.4 million host-level nodes with 13.4 billion edges, and 122.3 million domain-level nodes with 6.1 billion edges.

We are pleased to announce the release of the January 2026 crawl archive, containing 2.3 billion web pages, or 398 TiB of uncompressed content.

Recently, a two-day Bristol datathon used Common Crawl web archives to analyse UK industries and policy, strengthening social science research through hands-on, team-based work.

As SEOs grapple with the shift from traditional Search Engine Optimization to AI visibility, they're discovering a resource that's been powering AI training for years: Common Crawl's Web Graph.

A new Common Crawl index annotation has been added to Hugging Face and our S3 bucket.

From the 6th to the 10th of November 2025, Pedro Ortiz Suarez attended Mozfest in Barcelona, as well as some satellite events.

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 2025.

The crawl archive for December 2025 is now available, consisting of 2.16 billion web pages (or 364 TiB of uncompressed content).

As another year here at Common Crawl comes to a close, we present a dozen papers from 2025 that demonstrate the range of topics and areas of study for which Common Crawl’s datasets are used and referenced.

We are pleased to announce the release of the web graphs based on the crawls of September, October, and November of 2025, consisting of 235.7 million nodes and 9.5 billion edges at the host level, and 100.7 million nodes and 6.6 billion edges at the domain level.

We are pleased to announce that the crawl archive for November 2025 is now available, containing 2.29 billion web pages or 378 TiB of uncompressed content.

Common Crawl celebrates World Digital Preservation Day Nov. 6, which invites the community to unite in answering a powerful question: Why Preserve?

A recent article in The Atlantic makes several false and misleading claims about the Common Crawl Foundation, including the accusation that our organization has “lied to publishers” about our activities.

Check out our newsletter for October/November 2025, with updates on what we've been up to

The Common Crawl team presented a seminar at Stanford HAI entitled “Preserving Humanity's Knowledge and Making it Accessible: Addressing Challenges of Public Web Data”.

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 2025, consisting of of 468.4 million nodes and 8.0 billion edges at the host level, and 97.7 million nodes and 6.0 billion edges at the domain level.

We are pleased to announce the release of the October 2025 crawl, containing 2.61 billion web pages or 468 TiB of uncompressed content.

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.

Common Crawl has added IBM’s GneissWeb quality and category annotations to its web dataset, enabling users to filter high-quality content and explore topics like medical, education, and technology.

Common Crawl’s Web Languages initiative has had many contributions since its introduction. We’re calling for native speakers of certain languages to review language contributions, to ensure that links we’re adding to our seed crawl are of good quality.

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 2025. The host-level graph consists of 628.7 million nodes and 6.9 billion edges, and the domain-level graph consists of 184.6 million nodes and 5.4 billion edges.

The era of traditional search engine optimization is rapidly evolving into "AIO" (AI optimization), where businesses must ensure their content exists in AI training datasets to remain discoverable as users increasingly turn to AI assistants for answers, a shift that's already driving real business impact today and making presence in AI training data as strategically vital as traditional search rankings once were.

We are pleased to announce the release of our September 2025 crawl, containing 2.39 billion web pages, or 421 TiB of uncompressed content.

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.