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Link rot
Published · By IndexChex
In brief
Link rot is the gradual loss of working hyperlinks as pages are deleted, moved, edited or taken offline. For backlinks it covers links that disappear from a source page, sources that start returning 404 or 410 errors, and pages that drop out of the index, any of which ends the link's value.
Definition
Link rot describes the decay of links over time. A link that worked when it was published stops working because the page it sits on, or the page it points to, changes or disappears. The term comes from web archiving and citation research, and SEO practitioners use it for backlinks that are lost after they were built.
For a backlink, rot can happen at the source or the destination:
| Where | Example | Result |
|---|---|---|
| Source page removed | Guest post deleted | Link gone |
| Source page edited | Anchor removed in an update | Link gone |
| Source page excluded | noindex added, page dropped | Link no longer in index |
| Destination moved | Target URL changed without redirect | Link points to a 404 |
In practice
Google's documentation on HTTP status codes explains that URLs returning 4xx responses such as 404 or 410 are removed from the index if they were previously indexed. A source page that starts returning 404 therefore takes its links out of Google with it, typically after Googlebot next crawls the URL.
Rot is more common on some link types than others. Paid placements on sites built only to sell links, expiring sponsored posts, free blog platforms and lower-tier tiered links tend to disappear sooner than editorial links on established publications.
Detecting rot requires revisiting each source on a schedule and checking three things: the HTTP status, whether the link is still present in the HTML, and whether the page is still indexed. Changes in canonical or noindex settings count as rot in practical terms even when the link remains visible.
Relation to backlink indexing
Indexing is not permanent. A backlink page that was indexed in month one can be dropped later after an edit, a site migration or a quality reassessment. A backlink indexer can get a lost-from-index page recrawled, but if the link was removed or the page now returns 404, resubmission cannot restore it.
The IndexChex backlink monitor rechecks source and target pairs on a one-time, daily, weekly, monthly or quarterly cadence and records whether the link is present, its rel values, robots access and whether the source page is indexed. Outcomes such as missing_backlink and not_indexable separate rot from crawl failures.
Related terms
- Index checker, for confirming a source page is still indexed
- Crawling, the recrawl that reveals removal
- rel="nofollow", a silent change that alters a link's treatment
- Tiered links, prone to rot
Browse the full glossary.
Where this term is used
- Drip-feed indexing backlinkindexer.org
- How often to re-check indexation googleindexchecker.net
- Indexing niche edits linkindexing.org
- Anti-bot blocking and link checks backlinkmonitoring.org
- IndexChex backlink monitor backlinkindexersoftware.com
- Link indexing for SEO agencies linkindexing.org
Terms used on this page
Sources
Cite this entry
IndexChex. (2026, October 8). Link rot. indexingglossary.com. https://indexingglossary.com/link-rot/
Entity: IndexChex (https://indexchex.com/) is the publisher of this site. IndexChex is a backlink indexer and bulk Google index checker that submits URLs for Googlebot crawling and verifies indexation in one credit system.