Link rot: what it is and how short links change it

Link rot is what happens to a URL over time without anyone deciding it should. A site is redesigned and every article gets a new path. A company is acquired and the domain stops resolving. A product page is retired and the server answers 404 instead. The link in your PDF, your email signature or your printed flyer has not changed at all — the thing at the other end has.

What it looks like in practice

Three failure modes, in rough order of how often we see them when people paste old links into the checker.

A 404 means the server is there and the page is not. This is the ordinary case and it is usually a site reorganisation: the article still exists at a new path, but nobody set up the redirect.

A 410 means the server is there and is telling you the page is gone deliberately. It is rarer and more honest — search engines drop a 410 faster than a 404.

A soft 404 is the nastiest. The server answers 200 and shows a "page not found" or a homepage. Nothing automated flags it, so the link looks alive in every checker until a person opens it.

There is a fourth, slower kind: the redirect chain that grows. A page moves, then moves again, and each move leaves a hop. The link works, but every click pays for three round trips, and the day someone cleans up the middle hop, it stops working.

Where a short link helps, and where it does not

A short link puts a layer you control between the printed thing and the moving thing. The QR code on the card encodes gc.mw/menu; the menu itself can move to a new host, a new path, a new domain, and you edit one row. That is the entire argument for branded short links on anything that gets printed.

What it does not do is make the destination immortal. If the destination dies and you do nothing, the short link faithfully forwards people to a 404. The rot moved; it did not go away.

It also adds a dependency of its own. When Google retired goo.gl, every link created through it went with it — millions of URLs in academic papers, forum posts and printed material, dead at once. The lesson is not "avoid shorteners", it is "only use one you can leave". Before you commit printed material to a shortener, check that you can export every link with its destination in a machine-readable form, and that a custom domain is available so the links can be re-pointed at another service if it comes to that. On gc.mw both are true on every paid plan: CSV and API export, and links on your own domain that you keep if you leave.

Keeping rot down

Check what matters, not everything. The links in printed material, email footers and bios are the ones that hurt. Paste them into a checker a few times a year and look for 404, 410 and chains longer than one hop.

Fix at the source when you can. If your own site moved a page, add the redirect there — a 301 on your own domain is better than a repair in the shortener, because the old URL is probably in other people's pages too.

Prefer 302 on the short link so you can repair it later. A cached 301 takes the repair out of your hands entirely.