Also known as deadlink, URL no longer working, URL no longer found, website 404s, error 404, link to nowhere, link decay, offline
phenomenon in which URLs gradually tend to cease functioning
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~9 min read
A 404 Not Found error message as the result of navigating to a broken link Link rot (also called link death, link breaking, or reference rot) is the phenomenon of hyperlinks tending over time to cease to point to their originally targeted file, web page, or server due to that resource being relocated to a new address or becoming permanently unavailable. A link that no longer resolves at the intended target may be called broken or dead.
The rate of link rot is a subject of study and research due to its significance to the internet's ability to preserve information. Estimates of that rate vary dramatically between studies. Information professionals have warned that link rot could make important archival data disappear, potentially impacting the legal system and scholarship.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).