The domain lapses, and someone registers it.
Operators look for expired domains that established sites still link to. Once they own one, they put their own content where your link points, and your page keeps vouching for it.
Domains expire and get re-registered. Partners change hands. Hacks add links you never wrote. Link Signals reads every outbound link on your site, shows where each one leads today, and flags the ones that no longer belong.
Free plan: 50 links per scan. No card. Nothing to install.
Raised beds warm up faster, which suits tomatoes. Start with the SafeRHS growing guide for spacing and feeding, then pick a variety that ripens in your climate. If you grow for flavour, pick bush types and sow a little later.
From a sitemap to a ranked list of what to fix, how a re-check works, and how monitoring tells you when a link turns bad.
Read the full video transcript
You linked to those sites for good reasons, and nothing on your page has changed since. That is exactly the problem.
Operators look for expired domains that established sites still link to. Once they own one, they put their own content where your link points, and your page keeps vouching for it.
A supplier you cited for years is sold and becomes a casino or a pharmacy. The link on your page hasn’t moved, but the people you’re sending to have.
A compromised plugin, theme or account adds links your visitors never see: pushed off-screen, shown only to search engines, or built by encoded script.
Every SEO crawler will tell you a link is dead. That’s housekeeping. The risk starts when the domain behind it comes back to life under a new owner.
Keyword scanners flag an encyclopaedia article about casinos and miss the link hidden off-screen. Link Signals reads each link in context, looks at who holds the domain now, and tells you how it knows.
Follows sitemap indexes and compressed files, up to your plan’s page limit.
/sitemap_index.xml → 84 pagesWith its anchor text, and whether it’s hidden by one of 7 CSS tricks, cloaked, or written by script.
312 links · 4 hidden · 1 cloakedFetched like a browser, then checked against the domain’s registry: when it was registered, whether it has expired, whether it’s parked.
200 · “Best Slots Bonus 2026” · registered 6 days ago63,000+ adult and gambling domains from public blocklists. A hit is a confirmed verdict.
blocklist:gambling ✓A model reads the destination, the anchor and the page that carries the link, and asks whether the link makes sense there.
related: false · suspicious: trueNot a list of hundreds of links. A short action plan, then a card for each part of the scan, most urgent first.

Parked domains, then domains nobody holds, then links that don’t belong, then broken links, then anything else that needs a look. Paid plans can put them in their own order.
Each card shows its counts, says what to do, and has a button to the exact links behind it.
When your domain and security certificate run out, and whether your site serves HTTPS properly.


Every scan and monitoring check of a site is gathered in one place: what changed since last time, how many links were flagged each time, and the same cards for the latest check.
One button starts monitoring, or a free 7-day trial, depending on your plan.
When a scan finishes you get an email that leads with the most serious finding and what to do about it, then your action plan in order. You don’t have to keep the page open, or come back to see.

Load a sitemap and we compare its size with your plan before anything runs. If your plan covers it, we say so. If it doesn’t, we recommend the smallest plan that does and what it adds, so you never pay for more than you need. Monitoring is how a clean site stays clean.
Your sitemap lists 640 pages and Free reads up to 100, so we'll read a sample of 100 spread across the whole site (16%). Anything on the pages we don't read won't be checked. We recommend Starter (£9 a month): it reads up to 1,000 pages, which covers the whole site, and it's the smallest plan that does, so you aren't paying for more than you need. If you also want it checked automatically, Pro (£39 a month) adds monitoring.
Monitoring is what keeps a site clean after the scan: Pro (£39 a month) re-checks it automatically and emails you the day a link turns bad, so you hear about it before your visitors or Google do.

Over 20 years in technical SEO, organic search strategy, link building and digital growth, with SEO campaigns overseen for hundreds of websites, from startups to enterprise. Link Signals puts that experience into a tool that looks at your outbound links with the eye of someone who works with links for a living.
Know what your site links to before your visitors, or Google, do.
Audit a client site in one pass. No CMS login needed to start.
Ten years of posts means ten years of links that nobody rechecks.
Three findings of the kind a scan produces. Each one shows where it was found and why it was flagged.
Out of context: “Seasonal planting guide” links to gambling content. The domain is on a gambling blocklist, so this one is confirmed.
/guides/seasonal-planting“best slots bonus”“About us” links to pharma content, and the link is hidden from visitors with inline CSS.
/about“cheap viagra”This domain isn’t registered. Anyone can register it and take over this link. It was a partner’s, and the page still sends readers there.
/links“partner resources”Spam gets injected after the scan that said you were clean, and domains lapse after you’ve moved on. Monitoring re-checks your sitemap on a schedule and tells you when something new turns up. Included on the Pro and Scale plans.
Give Link Signals your sitemap and a schedule. It re-checks without you running another scan.
Pages whose sitemap date hasn’t moved are skipped, so checks stay quick and your allowance goes further.
A new risky link, or one that gets worse, triggers an email with the page and the reason. Nothing else does.
Since the last check, 2 outbound links have been flagged. The most serious are first.
Pick the plan that covers your pages. Monthly, in GBP, and you can cancel from your billing page.
Try it on a small site.
A site you look after.
Several sites, or one big one.
Agencies and large publishers.
No. It reads your public sitemap and public pages, the way a search engine does. Nothing is installed and you don’t share a login.
A blocklist hit is confirmed. Anything judged only by keywords or by the model is marked “Needs review” so a person decides. Treat the report as triage, not a verdict.
Every finding belongs to one of five priorities: parked, not registered, out of context, broken, then needs review. The report, the overview and the scan email all use the same order, and paid plans can change it.
Load your sitemap and we compare its size with your plan before anything runs. If your plan covers the site, we say so. If it doesn’t, we recommend the smallest plan that does and explain what it adds, so you don’t pay for more than you need.
The next scan or monitoring check reads the page again. If the link has gone or is no longer flagged it becomes resolved. If it is still a problem it is reopened. A link is never marked fixed on anyone’s word.
Yes, on a paid plan. Anyone signed in can report a problem and vote on ideas, paid plans can suggest features, and everything we publish is on the public roadmap.
No, only what a visitor or crawler can see. Links a page’s own scripts write, including encoded ones, are read, and a sample of pages is compared as a search crawler sees them. Links built only while scripts run are missed.
No. A broken-link tool reports that a link returns an error. Link Signals asks where a link leads now and whether it belongs. Links to dead or unreachable domains are re-checked on every monitoring check, and a destination that turns into casino, pharmacy or other unrelated content is flagged, with the reason.
It fetches a handful of pages at a time and identifies itself as LinkSignalsBot in the user agent. If you’d rather it stayed away, you can block it, or ask us to exclude your site entirely.
Yes, on the Pro and Scale plans. Add a sitemap to Monitoring and it re-checks on a schedule, reads only the pages whose sitemap date changed, and emails you when something new is flagged.
Anyone signed in can report problems and vote. Paid plans can suggest features. What is planned, in progress and shipped is public.
The free plan checks 50 links per scan, with the same evidence and the same checks as the paid plans.