[Google AI Overview at the query, signed out and incognito (operator defaults of 2026-10-01 and 2026-10-14). The paste is the Overview expanded (the 'AI Mode Conversation' view).] The 'You said' line carries the query twice, run together, and is given once here. Inline links are Google redirect URLs, kept as pasted. [QUERENT] Common Crawl [SYSTEM] Common Crawl is a 501(c)(3) non-profit organization founded in 2007 by Gil Elbaz that collects, preserves, and freely shares an open archive of internet data. [[1], [2]] Core Details & Scale * Mission: To democratize access to web information for researchers, educators, and developers. [[1], [2]] * Archive Size: Contains over 10 to 11 petabytes of data spanning nearly two decades. [[1], [2]] * Frequency: Adds roughly 3 to 5 billion new web pages each month. [1] * Hosting: Stored for free on Amazon Web Services (AWS) via its Open Data Sponsorship Program (`s3://commoncrawl`). [[1], [2]] Data Formats Common Crawl distributes its monthly crawls in three primary file formats: * WARC (Web Archive): Raw HTTP responses, including full HTML content and headers. [[1], [2]] * WET (Web Extracted Text): Cleaned plain-text content with HTML and code stripped away. [[1], [2]] * WAT (Web Archive Transformations): Metadata summaries in JSON format containing link and header details. [[1], [2]] Use Cases & Controversies * AI Training: The dataset serves as a foundational training corpus for many modern large language models (LLMs) developed by companies like OpenAI, Anthropic, Google, and Meta. [[1], [2]] * Research: Cited in over 10,000 academic and technical research papers. [1] * Web Scraping & Paywalls: Because its scraper (`CCBot`) does not execute dynamic browser code or login scripts, it has faced criticism and pushback from news publishers and media organizations over copyright and paywall bypass concerns. [[1], [2]] Would you like to know how to query the Common Crawl index for a specific URL, or how to block CCBot using a `robots.txt` file? Common Crawl