Broken links, lost backlinks, downtime:
caught before your visitors notice.

Expansel crawls every page of your site to find broken links, checks that your backlinks are still live and monitors uptime, SSL certificate included. You get an email as soon as a problem appears.

Free for one site, fifty backlinks and fifty crawled pages. No card, nothing to install.

What breaks while you are looking elsewhere

A link that leads nowhere, a backlink quietly removed, an outage on a Sunday night: three different problems, and almost always found out weeks too late.

✕

Broken links piling up

Two years of small edits, and a fifty-page site holds thirty links that lead nowhere.

✕

Backlink removed

A link won after three months of emails disappears in a redesign. Nobody warns you: the traffic simply drops.

✕

Silent downtime

The site goes down on a Sunday night, or its HTTPS certificate expires. On Monday morning, a customer is the one who tells you.

Three kinds of monitoring, one subscription

Technical health

Find broken links across your whole site, automatically

A crawl starts at your home page and follows every link to the last reachable page. 404 errors and broken links to sites that no longer exist come back with the exact page where to fix them.

  • Your pages in error
  • Your dead outbound links
  • Pages a robot can't read

From 50 to 50,000 pages per crawl, and up to 150,000 outbound links tested.

Broken link checker, in detail →
boutique-exemple.fr 17/09/2026
312
Pages crawled
1 847
Links checked
2
Pages in error
1
Dead outbound links

Pages in error (4xx / 5xx)

404 /blog/promo-printemps-2024 Found on /blog
410 /nos-produits/arrosoir-cuivre Found on /nos-produits

Dead outbound links

404 partenaire-ferme-exemple.com/catalogue Found on /nos-partenaires
Sample data

SEO

Monitor your backlinks: every lost link gets flagged

You add the links you earned, and every page meant to link to you is checked again. The backlink is still there, it was removed, or it switched to nofollow: in the last two cases, an email lets you know.

  • The link is still there
  • The anchor is recorded at every pass
  • The link is still dofollow

From 50 to 50,000 links followed, read again weekly, daily or twice a day.

Backlink monitoring, in detail →
Tracked backlinks 3 / 50
blog-jardinage-exemple.fr/meilleurs-outils Link present

Anchor text : guide des outils de jardin rel attribute : dofollow

annuaire-exemple.fr/fiche/1204 Problem

Anchor text : boutique-exemple.fr rel attribute : nofollow

The link is still there, but it turned nofollow: it no longer passes anything.

magazine-exemple.com/dossier-jardin Problem

The link is gone from the source page.

Sample data

Availability

Site down or SSL certificate expired: you get an alert

Your URLs are checked at regular intervals: HTTP status code, response time, and the SSL certificate with its expiry date. An outage, or an expiry date getting close, triggers an email.

  • The site answers
  • The HTTPS certificate is valid
  • Response time is measured

One check every 24 hours, every hour, or every quarter hour depending on the plan.

Website monitoring, in detail →
boutique-exemple.fr Online
99,62 %

Day by day

241 ms

avg

21/08/2026, 100,00 % (96) 22/08/2026, 100,00 % (96) 23/08/2026, 100,00 % (96) 24/08/2026, 100,00 % (96) 25/08/2026, 100,00 % (96) 26/08/2026, 100,00 % (96) 27/08/2026, 100,00 % (96) 28/08/2026, 100,00 % (96) 29/08/2026, 100,00 % (96) 30/08/2026, 100,00 % (96) 31/08/2026, 100,00 % (96) 01/09/2026, 91,06 % (96) 02/09/2026, 96,89 % (96) 03/09/2026, 100,00 % (96) 04/09/2026, 100,00 % (96) 05/09/2026, 100,00 % (96) 06/09/2026, 100,00 % (96) 07/09/2026, 100,00 % (96) 08/09/2026, 100,00 % (96) 09/09/2026, 100,00 % (96) 10/09/2026, 100,00 % (96) 11/09/2026, 100,00 % (96) 12/09/2026, 100,00 % (96) 13/09/2026, 99,77 % (96) 14/09/2026, 100,00 % (96) 15/09/2026, 100,00 % (96) 16/09/2026, 100,00 % (96) 17/09/2026, 100,00 % (96) 18/09/2026, 100,00 % (96) 19/09/2026, 100,00 % (96)
21/08 19/09

Response time

172 ms avg 243 ms 941 ms
HTTPS · exp. 19/02/2027 Sample data

An email alert as soon as a problem appears

A monitoring tool you have to open to know things are fine is no tool at all. Expansel stays quiet while nothing changes, and writes to you the moment something breaks. Here is exactly what lands in your inbox.

  • One email when the state changes, never a stream: a site down for three days does not produce three hundred messages.
  • A second email when it recovers, closing the incident without you having to check.
  • The useful detail inside the message: the address concerned, the code returned, the time of the check.
  • The crawl report is emailed too: how many anomalies were found, and a direct link to the list.
alertes@expansel.com 17:48

Alert: boutique-exemple.fr is not responding

The latest check on boutique-exemple.fr did not pass.

Address :
https://boutique-exemple.fr/
Detail :
HTTP 503
Checked at :
19/09/2026 17:48

You will get a second email as soon as it is back to normal: nothing to do on your side for that.

Recovered: boutique-exemple.fr is responding again

boutique-exemple.fr is responding normally again. The incident is closed.

Sample data

Pricing

Simple pricing, all three kinds of monitoring in every plan

No add-on to buy: broken links, backlinks and uptime are included in every plan, the free one too. Only the number of sites and how often they are checked change.

Free

Free

1 monitored site

Pro

19 € /mo

10 monitored sites

Business

59 € /mo

50 monitored sites

  • One account and one invoice instead of three subscriptions
  • A free plan that never expires, no credit card
  • Built and run from France, with a real person behind the contact address

Up and running in minutes

1

Add your sites

The addresses to watch. Uptime and the HTTPS certificate are included.

2

Add your backlinks

The pages meant to link to you, and the site they should mention.

3

Run a crawl

The rest runs on its own: automatic checks, and an email only when something changes.

Questions

What exactly is checked?

Three things: that every link on your site leads somewhere, including the ones pointing out to other sites; that the pages meant to link to you still do; and that your pages answer, HTTPS certificate included.

Do I need to install anything?

No. Your pages are read from the outside, the way a visitor or a search engine would. Nothing to deploy, no access to hand over.

Does this replace several subscriptions?

That is the idea. Uptime monitoring, backlink tracking and broken link auditing are usually paid for in three different places. Here they sit in one account and one invoice.

Is there a free plan?

Yes, and it does not expire: one site, fifty backlinks, fifty pages crawled, one check a day. No card is asked for.

What happens to the pages you fetch?

They are read, the result is kept, the page content is not. We store the HTTP code, the anchor text and the rel attribute, never a copy of the page.

Can I monitor a site I do not own?

You can monitor any publicly reachable page, exactly as a search engine would. Nothing is installed anywhere, and no access is needed.

Start with one site, for free

One address to enter, and the first check runs straight away.