The Codex began as an exercise in documenting the open web — a systematic effort to record websites by subject, free from algorithmic ranking or commercial bias. Every entry in the Codex was submitted voluntarily and recorded as presented. The directory is maintained as a public resource, accessible without registration or payment. The Codex is organised into twenty-two chapters, each corresponding to a broad subject area. Within each chapter, entries are recorded in the order they were received. There is no weighting, no scoring, and no mechanism for entries to purchase prominence. Submitting a site to the Codex is free. The submission form requests a URL and a chapter assignment; a brief description is welcome but not required. Entries are reviewed before being added to the record, and the Codex reserves the right to decline submissions that do not meet its basic standards for content and accessibility. The Codex does not claim to be comprehensive. The web is vast, and the directory represents a curated sample — sites that have been submitted and, upon review, recorded. It is a chronicle, not a census: a chronicle records what was brought to its attention, while a census would require actively seeking out every site in existence. We welcome questions, corrections, and new submissions. If you maintain a website and believe it has a place in the record, the submission form is open.