You spend weeks on a paper, cite forty sources, and submit it. Three years later, half those links lead nowhere. The page moved, the site folded, or the article you quoted got quietly edited into something it no longer says. That's link rot, and in academic and legal writing it's a credibility problem, not just a nuisance.
The fix is simple, and it costs about ten extra seconds per source.
What Is Link Rot (and "Reference Rot")?
Link rot is when a URL stops pointing to the content it used to. Studies of academic and legal citations keep turning up the same result: a large share of cited links no longer resolve. In older legal scholarship and Supreme Court opinions, the figure is often cited at around 50%.
There's a sneakier version called reference rot. The link still works, but the content has changed. The page you cited as evidence now says something different, and nobody can see the version you actually read. In some ways that's worse than a dead link, because it's invisible.
A working link isn't the same as a working citation. If the page can change after you cite it, your reader has no way to confirm what you saw. Cite a frozen version instead.
The One Rule That Fixes Most of It: Archive Before You Cite
The core move: before you paste a URL into your references, snapshot it, and cite the snapshot. Your citation then points to a frozen, dated copy that can't be moved or edited. Whatever happens to the live page, your reader sees exactly what you saw.
Make it a reflex. The moment you decide to cite a source, archive it. Archiving after you finish writing is how sources slip away, because some are already gone by the time you circle back.
Three Tools for Durable Citations
Wayback Machine — free and universal
Go to web.archive.org, paste your URL, and click "Save Page Now." You'll get a permanent, timestamped snapshot URL like web.archive.org/web/2026.../https://example.com/article. Cite that URL. It's free, it's trusted, and most style guides accept it.
perma.cc — built for scholarship and law
perma.cc was created by law libraries to stop citation link rot. It produces short, permanent "perma links" meant to live in footnotes and legal records indefinitely. If you're publishing somewhere academic or legal, check whether they already give you perma.cc access. Many do.
archive.today — when Wayback can't reach it
archive.today (also archive.ph) is handy for pages the Wayback Machine struggles with, including some JavaScript-heavy or partly gated ones. It captures both a screenshot and a text snapshot.
How to Format the Citation
You don't need to memorize every style guide. Just include enough that a reader can find the frozen version. The pattern holds across APA, MLA, and Chicago:
- Cite the source normally: author, title, original site, date.
- Add an access or retrieval date, the day you read it.
- Include the archived snapshot URL alongside or in place of the original link.
A quick example:
Smith, J. (2024). Why archives matter. Example Journal. Archived June 2, 2026, at https://web.archive.org/web/2026.../https://example.com/why-archives-matter
Punctuation varies by style, but "original details, access date, archived link" is the combination that keeps a citation alive.
Where a Read-Later App Fits (and Where It Doesn't)
While you're researching, it helps to keep your own searchable copy of every source, so you can pull a quote without re-hunting the page and still have the text if the live site changes. A read-later app like Gleamr does this well: it saves the full article, indexes every word for search, and exports everything to JSON.
The boundary matters, though. Your personal copy is for your workflow, not for citing. A reader can't open your private library. For the citation itself, you still want a public, verifiable snapshot from the Wayback Machine or perma.cc. Use the read-later app to work; use the archive to cite.
Frequently Asked Questions
What is link rot?
Link rot is when a URL stops pointing to the content it originally referenced, because the page was moved, deleted, or the site went offline. In citations, it means a reader following your reference reaches a dead link or the wrong content.
How do I cite a web page that might change?
Archive it before you cite it. Create a permanent snapshot with the Wayback Machine's "Save Page Now" or with perma.cc, then cite the snapshot URL along with an access date. That gives readers a frozen version that matches what you read.
Is it acceptable to cite the Wayback Machine?
Yes. Major style guides (APA, MLA, Chicago) accept archived URLs, and citing a Wayback Machine snapshot is widely considered good practice because it protects against link rot. Include the original source details and the date you accessed it.
What's the difference between link rot and reference rot?
Link rot means the link no longer works at all. Reference rot means the link still works but the content has changed since you cited it, so it no longer supports your claim. Archiving the page when you cite it protects against both.
Researchers lose hours re-finding sources they've already read. Gleamr keeps a searchable copy of everything you save, with JSON export and 10 free articles to start. For the archiving methods behind durable citations, see how to permanently save a webpage.