Broken Link Building: The Tactic Is the Easy Part
Everyone optimises the scrape. The thing that decides whether this works is the page you are asking them to link to instead.
Broken link building is the practice of finding a dead page that other sites still link to, building something better in its place, and asking those sites to point at yours instead.
That is the entire mechanic and you can learn it in a paragraph. Which is odd, because it is also one of the most argued-about tactics in the field. Half the industry runs it as a staple. The other half will tell you it is a waste of a week. Both camps are looking at roughly the same reply rates. They disagree about the cause.
The position this piece takes: broken link building is not a link tactic, it is a replacement business.
You are not asking a stranger for a favour. You are applying to be the successor to a resource that already earned links and then stopped existing. Framed that way, the part everyone obsesses over — scraping 404s — is the cheap, abundant input.
The scarce asset is the replacement page, not the dead link. Most campaigns invert that ratio and then blame the tactic for the result.
The short version
- Dead pages are not scarce. Pew Research Center found that a quarter of all webpages that existed at some point between 2013 and 2023 were no longer accessible as of October 2023.
- The links pointing at a dead page do not die with it. They sit on live pages, stranded, which is exactly what makes them winnable.
- Google's documentation is blunt about the destination: it "doesn't index URLs that return a 4xx status code," and URLs already indexed get removed.
- The pitch is not "you have a broken link." It is "here is the patch for a hole your readers are already hitting."
- If your replacement is a topical near-match rather than a real successor, outreach volume will not rescue it.
What is broken link building?#
It is a four-step loop: find a dead page that has backlinks, work out what that page was for, build a better version of it on your own site, then contact the people still linking to the dead one and give them something to point at.
The logic is simple and it is not a trick. An editor who linked to a resource in 2019 wanted their reader to get that resource. Today the reader gets a 404. That is a small, real defect on a page the editor is responsible for, and you are the only person on earth offering to fix it for free. Nothing about that is a loophole. It is one of the few link plays where the interests genuinely line up, which is why it survives while most tactics rot.
If the underlying mechanics are new to you, start with what a backlink actually is — everything below assumes you know why a link from a real, read page is worth chasing in the first place.
Does broken link building still work?#
Yes, and the honest answer is that it works unevenly enough that reasonable people disagree. Ahrefs' own guide to broken link building is unusually candid about this. It notes the tactic ranks as the fifth most widely used in Aira's annual state of link building survey of more than 250 marketing professionals, then immediately quotes a practitioner calling it "an almost pointless tactic" and concedes that SEOs are split.
Both observations are true at once, which is the interesting part. A tactic can be widely used and widely disappointing when the thing that determines the outcome is not the tactic. Everyone runs the same four steps. Almost everyone runs them with the effort distributed in the same wrong proportions.
What has genuinely changed is the supply side, and it has changed in your favour. Pew Research Center's May 2024 study When Online Content Disappears followed links found on news sites, government sites and in Wikipedia references to see how many destinations still existed. The decay is not marginal: 38% of webpages that existed in 2013 are gone, against 8% of pages that existed in 2023. Twenty-three percent of news webpages contain at least one broken link, as do 21% of government pages, and 54% of Wikipedia pages have at least one dead reference.
Read that last number again. More than half of all Wikipedia articles contain a citation pointing at something that no longer exists, on the most-cited reference work on the internet, maintained by people who care. If the well-tended parts of the web leak that badly, the rest is worse. You are not competing for a rare resource. You are competing on what you offer in exchange for it.
What actually happens to a link when the page it points to dies?#
Nothing happens to the link. Something happens to the destination. This distinction is the whole reason the tactic exists and most write-ups skip it.
When a page starts returning 404, the anchor tags pointing at it stay exactly where they are, in the HTML of pages that are still live, still crawled, still read. What changes is the other end. Google's documentation on how HTTP status codes affect Search states that "Google doesn't use the content from URLs that return 4xx status codes. If a URL was previously used but is now returning 4xx status code, Google systems will stop using the URL over time." It goes on: "Google doesn't index URLs that return a 4xx status code, and URLs that are already indexed and return a 4xx status code are removed."
So the equity is not destroyed on a schedule you can watch. The destination simply stops being a place.
The inbound links, meanwhile, become stranded: real, live, pointing at nothing. That stranded set is the asset you are competing for, and there are only two ways it ever gets resolved.
That fork has a practical consequence people miss. Before you pitch fifty external sites, check whether the dead URL's own domain is still standing.
If a competitor killed a page but kept the site, the cleanest fix for them is a 301 to their nearest live page. Google treats a 301 as "a strong signal that the redirect target should be processed," and they may well do it the moment anyone points it out.
Your window exists because nobody has told them. It closes the day someone does. So prioritise dead pages on domains that are themselves gone, parked, or visibly abandoned, because there is no one home to reclaim the links.
How do you find broken pages worth chasing?#
Start from a topic you could credibly own, not from a scrape. The methods below are all fine; they differ in cost and in how quickly they exhaust.
| How you find them | What it gives you | Cost | Where it runs out |
|---|---|---|---|
| Competitor's dead pages | A backlink tool's "best by links" report filtered to 404s, sorted by referring domains | Paid tool | A handful of domains, then you are repeating yourself |
| Dead pages by topic | A web-scale content index searched for 404 pages about a subject | Paid tool, higher tier | Broadest option, but the results need heavy manual vetting |
| Resource pages in your niche | Search for roundup and "useful links" pages, then crawl their outbound links for 404s | Free, slow | Resource pages are heavily solicited already |
| Wikipedia dead references | Articles carrying dead-link markers on citations in your subject area | Free | Nofollow, strict sourcing rules, but excellent discovery |
The Wikipedia route deserves a note given that 54% of pages have at least one dead reference. Those links are nofollow, so if you are chasing equity alone you will skip them. That is usually a mistake, and I have argued the general case in dofollow vs nofollow links. A replaced citation on a Wikipedia article in your field gets read by journalists and researchers who then cite you from their own editorial pages, and those are not nofollow.
Whatever method you use, the list it produces is a list of candidates, not opportunities. Vet before you write a single email.
| Check | What you are looking for | Kill it if |
|---|---|---|
| Referring domains | More than a handful of distinct sites, not a hundred links from one blogroll | It is one site linking sitewide |
| Are the linking pages alive | The pages holding the link still load and still get read | The linkers are dead too, which is common |
| Link context | The anchor sits in body copy, in a sentence you can actually replace | It is a footer, sidebar or link dump |
| Is the domain abandoned | The dead page's own site is gone or clearly unmaintained | The owner is active and will just 301 it |
| Can you honestly replace it | You can build the better successor, not an adjacent post | The topic is outside what you can credibly publish |
| Relevance to you | A link from that page would make sense to a reader | You would only want it for the metric |
That last row is the one people delete from their own checklist. If the link would look arbitrary to a human reading the page, it will look arbitrary to the editor you are asking, and the reply rate tells you so. The broader case for judging prospects this way sits in link building prospecting.
Why does the replacement page decide everything?#
Because the editor is not choosing whether to fix a broken link. They are choosing what to put in the hole, and you are one of several possible answers, including "delete the sentence."
This is where the Wayback Machine stops being a nice-to-have and becomes the job. Paste the dead URL into web.archive.org and read what was actually there. Not the title. The content. What question did it answer, at what depth, for whom, with what tables or data or downloads? Then look at how the still-live pages describe it in their anchor text and surrounding sentence, because that tells you what the linking editor thought they were sending their reader to.
Now compare that against the page you were planning to pitch. Most of the time the honest verdict is that yours is adjacent, not equivalent. It covers the topic. It does not do the job. An editor can tell the difference in four seconds, and a near-match is the single most common reason a well-researched campaign returns nothing.
So build the successor, not a cousin. If the dead page was a 40-row comparison table, your 900-word explainer is not a replacement and pretending otherwise wastes everyone's morning. If it was a calculator, build the calculator. If it was a dataset someone stopped updating, update it and say so in the first line of the page. The bar is not "good content." The bar is that a reasonable editor, given four seconds, agrees your URL does what the old one did.
Do that well and a second thing happens for free. A genuine successor to a resource that earned links once tends to earn new ones on its own, from people you never emailed, which is the compounding half of how to get more backlinks.
What does the outreach email actually look like?#
Short, specific, and free of the words "I noticed." Name the page, name the broken link, say what it used to be, say what you built, stop. No compliment opener, no paragraph about how much you love their work, no attachment.
Subject: dead link on your PPC benchmarks post
Hi Maria,
Your PPC benchmarks roundup links to ppcbenchmarkinstitute.org/2019-cpc-report in the
"industry averages" section. That domain has been down since last year,
so the citation behind your CPC figures goes nowhere.
We rebuilt that dataset for 2026 with the same industry cuts and the
methodology written out: yoursite.com/ppc-cpc-benchmarks-2026
Swap it in if it fits. If it doesn't, worth killing the link anyway,
it's the only broken one on the page.
Adam
Three things are doing the work there. It names the exact URL and the exact section, which proves a human looked. It says what the reader loses right now, which is the actual problem. And it gives them a clean out — "worth killing the link anyway" — which removes the feeling of being sold to and, counterintuitively, is the line that most often gets the swap.
What to avoid is the favour framing. "I noticed you have a broken link, would you mind linking to us?" asks the editor to do you a kindness. The version above reports a defect and hands over the patch. Same facts, different transaction. The general principles behind that sit in link building outreach, and they apply here with one addition: because you have a verifiable, dated fact about their page, you have earned the right to be brief.
One send is not a campaign. Most replacements come on the second touch, a week later, one line long, no new pitch. And keep the ask honest: offering payment or a reciprocal link turns a legitimate fix into a link scheme under Google's spam policies, and the placement stops being worth having.
How do you scale it without turning it into spam?#
By scaling the research, not the sending. Every part of this that produces results is research: which dead page, what it was, who still links to it, who at that organisation owns the page, what specifically breaks for their reader. The part that does not scale by hand is doing that research a few hundred times and then keeping track of who replied.
That is the job GenLink takes. It finds the relevant sites, works out who the right contact is, writes the pitch against the specifics of that page, sends from warmed mailboxes, follows up on a schedule and triages the replies so you only look at the live ones.
What it does not do is decide which dead page is worth replacing, or build the replacement. That stays yours, and the diagram above is why: automating the abundant half of a campaign while the scarce half is missing just produces a faster nothing. The free tier is enough to see what it drafts before you commit a domain to it. Start free.
The discipline that keeps this from becoming spam is a number: how many dead pages you are willing to genuinely replace this quarter. If that number is four, then four is your campaign size, and the outreach is the small part. Anyone sending a thousand broken-link emails is not running this tactic. They are running a volume play with a broken-link pretext, and editors recognise it immediately because the replacement URL never quite fits.
What does this mean for how you build links?#
It means you change where the week goes. Spend an afternoon finding candidates instead of three days, because the Pew numbers say the candidates are everywhere and always will be. Spend the saved time in the Wayback Machine working out what actually died, and then on building the thing that deserves to take its place.
Judged as a link tactic, broken link building looks mediocre — you send a lot of email and most of it goes nowhere. Judged as a replacement business it looks obvious: the web deletes a quarter of itself per decade, the links to the deleted parts stay live and stranded, and the only qualification for inheriting them is building something worth inheriting them. That second framing is also the one that survives however search changes, because it does not depend on a loophole. It depends on a page being better.
Pick one dead resource in your niche this week and actually replace it properly. Open a free GenLink agent to handle the finding and the follow-ups while you build the page.
Frequently asked questions#
Is broken link building still effective in 2026?
Yes, though the outcome depends far more on your replacement page than on the tactic. The supply of opportunities is growing: Pew Research Center found 38% of pages that existed in 2013 are already gone, and 23% of news pages carry at least one broken link. What has not changed is that editors only swap a link when the new destination genuinely does the old one's job.
How do I find broken links on a website?
Crawl the site's outbound links and check which return a 4xx status, using a site crawler or a backlink tool's report of 404 pages sorted by referring domains. Free options include browser extensions that flag dead links on a page you are reading, and searching for resource or roundup pages in your niche and crawling their link lists manually.
What is the best tool for broken link building?
There is no single tool because the job has three parts. A backlink index finds dead pages that still have links, the Wayback Machine tells you what those pages contained, and an outreach system handles contacts, sending and follow-ups. Most failed campaigns own the first tool and skip the second, which is the one that determines whether your pitch lands.
How do I write a broken link outreach email?
Name the exact page and the exact broken URL, say what the reader loses today, link your replacement, and offer them the option of simply deleting the link instead. Keep it under 120 words, skip the compliment opener, and follow up once about a week later. Specificity is the proof that a human looked at their page rather than a script.
Is broken link building black hat?
No. You are reporting a real defect on someone's page and offering a free fix, and the editor keeps full control over whether to use it. It only becomes a problem if you attach payment or a reciprocal link to the request, which turns it into a link scheme under Google's spam policies. The tactic itself is one of the more legitimate ones available.
How long does broken link building take to work?
Expect weeks, not days. Building a credible replacement page is usually several days of work on its own, outreach replies arrive over one to three weeks and often on the second follow-up, and any ranking effect from the links that land takes longer still. Campaigns judged after a single send and a week of waiting are being judged too early.
