You read a page, quote it, and add the link. Two years later a reader follows the link and finds a different page, an error, or a home page. Your footnote is now a claim nobody can check.
This is common, not unlucky. Pew Research Center found that 38% of web pages that existed in 2013 were no longer accessible by October 2023. We list the other studies in link rot by the numbers. The fix is a few habits at the moment you read the source, not a better citation format.
What an ordinary web citation leaves out
A standard web citation gives an author, a title, a site, a URL and perhaps a date. It leaves out three things a sceptical reader needs.
- What the page said. A URL points to whatever is there now. If the page was edited, the link works and shows the wrong text.
- When you saw it. An access date helps, but it is your statement about yourself. Nothing else backs it.
- Whether it still exists. The reader finds out only by clicking.
A page that quietly changes is the hardest of these to catch. Nothing signals it, and your accurate quotation looks like a misquotation.
Which sources need more than a link
Not every source needs a copy. Match the effort to the risk.
| Source | Risk of change or loss | What to keep |
|---|---|---|
| Journal article with a DOI | Low | The DOI |
| Government report published as a dated PDF | Low to medium | The URL and a saved copy of the file |
| News article | Medium: stories are corrected, moved or removed | An archived copy and the publication date |
| Company page, policy, price or terms | High: edited in place, no public history | A dated capture, kept by you |
| Social media post | High: can be deleted or edited | A dated capture |
| Anything you quote to criticise, or that a dispute could turn on | High, and the stakes are higher | A dated capture, and a note of how you made it |
The last row is the one that matters most. If a source carries your argument, keep your own copy of it.
Five steps when you read a source you will cite
- Record the details the page gives. Author, title, site, the publication or last-updated date if the page shows one, and the full URL, including any redirect you ended up on.
- Save a copy now, not when you write up. The page you read this afternoon is the one to keep. By the time you draft the footnote it may have changed.
- Note the date and time you saved it, and your reason: which claim in your work it supports.
- Quote from the saved copy, not from memory or the live page. Copy the passage as saved, and check it again when you proofread.
- Cite the original and say where the copy is. The original URL stays in the citation. Add the address of the archived copy, or a line saying you hold a saved copy.
Step 5 is where most guidance stops, so it deserves a closer look.
Citing the copy as well as the original
The legal-citation project Perma.cc, run from Harvard, was built for this problem. Its authors describe the approach: the author saves a copy of the page when they cite it and includes the permanent link in addition to the original URL, or in place of it. The same article reports that 49.9% of links in US Supreme Court opinions no longer had the cited material, and more than 70% in three Harvard law journals.
Two points follow from that, whatever tool you use:
- Give both addresses. The original shows the reader where the material came from. The copy shows what it said when you used it.
- Use a copy a reader can open. A copy in your own files cannot be followed from a footnote. A copy at a stable public address can.
A public archive is not always possible. Pages that a public archive cannot reach, or that you would rather not republish, need another route: keep your own copy and say so in the citation. A line such as "Page as read on 14 October 2026; saved copy held by the author and available on request" is honest and checkable.
What the style guides say
The rules differ by style, and some are silent on archives. Read the one your publisher or institution uses. Where we have checked one:
- Chicago (18th edition). According to Purdue's guide to it, a source with no publication or revision date should carry the date you accessed it, placed immediately before the URL. Access dates are not required for formally published electronic sources such as journal articles, but can help with informal ones. If the content is later changed or removed, the guide says to add a note to that effect in the text or the citation, with an "as of" date where you can. It does not mention archived copies.
Where a guide has no rule for archived copies, adding one is usually allowed and never hurts the reader. If a journal or court has house rules, follow them.
Mistakes that break a citation
- Citing a shortened or tracking link. Strip tracking parameters such as
utm_sourceand cite the page's own address. - Citing the search result page or a login-only view. Cite the page a reader can reach.
- Saving only a screenshot. It shows what you saw, but the text cannot be searched or checked against the live page. We compare formats in screenshot, PDF or web capture.
- Trusting a public archive without checking it. The Wayback Machine may hold the page, or may not, and its copy may be from another day. We cover this in Wayback Machine captures as evidence.
- Saving after the dispute starts. A copy made once someone challenges your quote proves less than one made when you read the page.
Where Archivepanel fits
Archivepanel does one part of this job: it saves a public page, one at a time, as a self-contained HTML file with a text version, a preview, a WARC file and a manifest holding a SHA-256 digest of each file. The file is signed with an RFC 3161 timestamp from DigiCert, so the date of the copy does not rest on your word alone. Each record has a note field (2,000 characters) for the claim the page supports, and tags to group sources by project. See Capture.
Two limits are relevant here. Archivepanel does not capture pages behind a login. And captures are private to your workspace: a reader cannot open one from a footnote. You keep the copy and produce it when asked. The free plan includes 100 MB of storage.
Sources
- Pew Research Center, When Online Content Disappears, 17 May 2024.
- Zittrain, Albert and Lessig, Perma: Scoping and Addressing the Problem of Link and Reference Rot in Legal Citations, Harvard Law Review Forum, vol. 127.
- Purdue Online Writing Lab, Chicago Manual of Style 18th edition: web sources.