ssl shield

Continuous certificate monitoring

An SSL certificate is an essential part of website security. We check all your SSL certificate expiration dates & alert any change we detect. We give you actionable & user friendly alerts so you know what to fix.

Start monitoring

10 day free trial
No credit card required

ssl certificate meta
01

Taking away the complexity of SSL moitoring

Clean reporting of every certification step

The world of SSL/TLS has become very complex. We can take away that complexity for you and present you with an easy-to-use monitoring solution for your SSL certificates.

We'll monitor your website's certificate expiration dates and send you a notification when they're about to expire.

the main reasons websites go down
  • Certificates form a chain of trust. We don't only monitor your domain (leaf) certificate, but every intermediate too.
  • Other monitoring tools often only check the domain certificate.
certificate-error-message
02

Your visitors will get an error message

if a certificate is revoked or outdated

If you're using old security algoritms, some browsers will block access to your site. We detect those old ciphers and will report them to you.

Error messages like this negatively affect your brand image (and ultimately, your bottom line) as they make your website feel inaccessible and unthrustworthy. Keeping track of your certificates avoids these unpleasant surprises.

re-run check without leaving Slack!
Oh Dear01:45 P.M.
urlxyz.com seems down!
Error: HTTP/1.1 404 Not found
Downtime verified from Paris, France and Bangalore, India
Full report: https://ohdear.app/sites/8716/history/runs/875879191
Check again
Messages
now
Oh Dear!

urlxyz.com has recovered after 2m. full report: https:/ohdear.app/sites/83/checks/411

Messages
now
Oh Dear!

urlxyz.com seems down! Error: HTTP/500 Downtown veririef from Paris, France and Frankfurt

Messages
now
Oh Dear!

Text messages for urlxyz.com have been successfully enabled. We'll notify you when something goes wrong.

CALLING WEBHOOK
$_TOKEN="your API token"
$ curl -X GET "https://notifyservicexyz.com/api/alert/urlxyzcom" \
-H "Authorization: Bearer $_TOKEN" \
-H "Accept: application/json" \
-H "Content-Type: application/json"
act directly from within Microsoft Teams!
Oh Dear01:45 P.M.
urlxyz.com seems down!
Error: HTTP/500 Downtown veririef from Paris, France and Frankfurt
View full report
Reply
SITE OFFLINE
urlxyz.com is down
Component Value
Url https://urlxyz.ccom
Error description Operation timed out after 5001 milliseconds with 0 bytes received
Initiate follow-up actions directly in Telegram!
Oh Dear01:45 P.M.
urlxyz.comseems down
Error: HTTP:500 Downtime verified from Paris, France
👀 Full Report
🔄 Check again
😴 Snooze
Messages
now
Oh Dear!

urlxyz.com has recovered after 2m. full report: https://ohdear.app/sites/83/checks/411

Messages
now
Oh Dear!

urlxyz.com seems down! Error: HTTP/500 Downtown veririef from Paris, France and Frankfurt

Messages
now
Oh Dear!

Pushover has been successfully enabled. We'll notify you when something goes wrong.

Access full reports straight from Discord!
Oh Dear01:45 P.M.
urlxyz.com has recovered after 2m. Full report: https://ohdear.app/sites/87/history/runs/875879191
Paris, France - Today at 10:56
urlxyz.com seems down!
Error: HTTP/1.1 404 Not Found
03

Choose how we let you know

when our crawler finds broken links or mixed content

Receive our notifications on your prefered platform. Via email, SMS, Slack, Discord, Microsoft Teams, Pushover, webhooks,… we can notify you wherever your team is active.

Take notifications to the next level: only notify who needs notifying by assigning responsabilities to different team members.

Stop worrying, start monitoring

Start a no-strings-attached 10-day free trial. You're all set in less than a minute.
(No credit card needed.)

Not convinced yet? Need help?
Get in touch via support@ohdear.app.

Let’s get technical (if you’re into that)

You don’t need to be computer savvy to set up our tool. But if you are, we’re happy to explain exactly how it works and how you can customize Oh Dear to your specific needs.

ssl certificate meta dark

Certificate Chain Validation

how we crawl your site pages

A chain is only as strong as its weakest link. SSL certificates are the prime example.

We don't just monitor your domain certificate but will check every intermediate certificate too, up to the root certificate, to verify the chain of trust.

We look for SHA-1 certificates, revoked or distrusted root certificates, ... each of these can cause your site to be unavailable. And none of those changes are in your control, these decisions get made by the Certificate Authorities (CAs) or the browsers themselves, coordinated via the CAB Forum.

In a chain, every certificate could cause a problem for your website. We monitor each and every one of them.

slack message

Certificate Change Detection

a clear before/after comparison

When a certificate is changed, we'll let you know straight away. We'll show a clear before/after comparison of the certificates we found, so you can verify that this change is both intentional and correct.

A changed certificate could be a renewal, but might also be a move to a new server (with a DNS change) or a domain hijack. We'll make sure you see each change!

raw output certificate

Certificate Transparency Monitoring & Alerting

monitoring Certificate Logs

All issued SSL certificates need to be published to known Certificate Logs. As a result, every certificate issued becomes public knowledge.

We monitor those Certificate Transparency Logs and will alert you whenever a new certificate is issued for one of your domains. You can decide if it was on purpose by you or from a malicious actor and act accordingly.

Really into the nitty gritty details?

Want to get into the nitty gritty details of our monitoring?
Have a look at our documentation.

Wait, there’s even more

mobile preview

Start monitoring instantly

Start a no-strings-attached 10-day free trial. You're all set in less than a minute.
(No credit card needed.)

Not convinced yet? Need help?
Get in touch via support@ohdear.app.