Live status
Certificate status
See whether the live certificate is valid, expired, invalid, or unavailable.
Free SSL certificate checker
Check SSL Certificate Online
Use this free SSL checker to check a website's SSL certificate status, issuer, expiration date, and hostname coverage. See the result first, then monitor it for free if needed.
No account to checkExpiration dateIssuer detailsHostname coverage
Example result
example.com
Expires in
82 days
Renewal window visible
Issuer
Let's Encrypt
Live certificate authority
Hostname
Covered
Certificate matches example.com
After checking, monitor this certificate for free.
Add the checked domain to PulseSSL and monitor up to 2 certificates for free with daily checks and email reminders.
What gets checked
What the SSL certificate checker shows
PulseSSL checks the live SSL certificate returned by your domain and summarizes the details that matter for renewal, trust, and hostname coverage.
After checking, you can add the domain to PulseSSL for daily monitoring and email reminders.
Days remaining
Expiration date
Check the exact expiration date and how many days remain before renewal.
Issuer details
Issuer details
View the certificate authority currently serving the domain.
Hostname coverage
Hostname coverage
Verify whether the certificate covers the hostname you entered.
Result guide
What your SSL check result means
Use the SSL certificate check to verify the live certificate, expiration date, hostname match, and connection state before you decide whether the domain needs monitoring.
Example output
What PulseSSL reads from a live certificate
Status
Valid
trusted by clients
Expires in
82 days
renewal window
Issuer
Let's Encrypt
certificate authority
Hostname
Covered
domain match
Check once for the live result. Save the domain only when you want daily SSL checks and email reminders.
Result decoder
Signals to review after the check
ResultSignalMeaning
Valid certificateTrusted
The HTTPS certificate is trusted for the checked hostname and still has time before expiration.
Expiring soonRenew
The certificate still works, but the renewal window is close enough that an owner should confirm the replacement plan.
Expired certificateFix now
Browsers and API clients may reject the site because the certificate is past its expiration date.
Hostname mismatchMismatch
The certificate is live, but it does not cover the exact domain, subdomain, or HTTPS URL users are visiting.
Unexpected issuerChanged
The certificate authority differs from what you expected, which can happen after hosting, CDN, or renewal changes.
Check failedUnavailable
The domain may not resolve, port 443 may be unavailable, or the TLS connection may fail before a certificate can be read.
How it works
How to check an SSL certificate online
Enter a domain or URL, review the live certificate result, then keep it monitored with daily checks and email reminders.
01
Enter a domain or URL
Use a domain like example.com, a subdomain, or a full HTTPS URL. PulseSSL normalizes the input before checking the certificate.
02
Review the live certificate result
See the certificate status, expiration date, issuer, hostname coverage, and port before you create an account.
03
Monitor this certificate for free
No account is needed to view the result. Sign in with a Google account only when you want daily SSL checks and email reminders.
From snapshot to monitoring
One SSL check is useful. Monitoring prevents renewal surprises.
A one-time check confirms what is live right now. PulseSSL keeps checking every day, so renewals do not depend on memory, calendars, or a single hosting inbox.
One-time check
PulseSSL monitoring
Check current certificate status
Daily certificate checks
See current expiration date
Email reminders before renewal
View issuer details
See when renewal is needed
Confirm hostname coverage
Monitor up to 2 domains for free
Your first 2 monitored domains are free.
Use the checker for the first certificate, then keep important production, API, or client domains visible in your workspace.
Certificate issues
Common SSL certificate issues this check can surface
PulseSSL is not a vulnerability scanner. The checker focuses on certificate details that can break browser trust, checkout flows, API clients, and renewals.
Expired certificate
Visitors can hit browser warnings before your team notices the renewal missed its window.
Certificate expiring soon
A valid certificate can still be risky when renewal time is close and no owner is watching it.
Hostname mismatch
The certificate may be valid, but not for the hostname users or API clients are reaching.
Wrong certificate returned
Load balancers, proxies, or hosting changes can return a different certificate than expected.
Trust or chain errors
Certificate or TLS connection problems can prevent browsers and API clients from trusting the domain.
Unexpected issuer
Confirm which certificate authority is currently serving the domain after a renewal or hosting change.
FAQ
SSL certificate checker FAQ
Short answers about checking certificate validity, what PulseSSL returns, and when one-time checks should become monitoring.
What is an SSL certificate checker?
An SSL certificate checker inspects the live certificate returned by a public website or hostname. PulseSSL checks the certificate status, issuer details, issue date, expiration date, days remaining, hostname coverage, port, and latest check time when available.
How do I check if my SSL certificate is valid?
Enter a public domain or HTTPS URL into the checker. PulseSSL normalizes the input, checks the certificate on port 443, and shows whether the certificate is valid, expiring soon, expired, invalid, or returning an error.
Can I check an SSL certificate without signing up or installing anything?
Yes. You can start a certificate check without creating an account and without installing an agent, shell script, browser extension, or server package. Creating an account is only needed when you want to save the domain for daily monitoring and email reminders.
What certificate details does PulseSSL show?
PulseSSL shows the checked hostname, certificate status, issuer, issue date, expiration date, days remaining, hostname coverage, port, and check time when available.
How do I check SSL certificate expiration date?
Enter the domain, subdomain, or HTTPS URL into the free SSL checker. PulseSSL returns the live certificate expiration date and the number of days remaining, so you can see whether the certificate is valid, expiring soon, or already expired.
How do I verify website SSL certificate details?
Use PulseSSL to verify website SSL certificate details returned on port 443. The result shows the certificate status, issuer, expiration date, hostname coverage, and whether the checked host is covered by the certificate.
Can I check HTTPS certificate details for a public site?
Yes. Enter a public HTTPS URL or hostname to check HTTPS certificate details. PulseSSL gives you a quick way to test SSL certificate status, expiration date, issuer, and hostname coverage without installing an agent.
What does hostname mismatch mean in an SSL certificate check?
A hostname mismatch means the certificate does not cover the exact domain or subdomain being checked. The certificate may be valid for another hostname, but browsers, API clients, and integrations can still reject the connection for the hostname users are reaching.
Is a one-time SSL check enough?
A one-time check is useful as a snapshot, but certificates can expire later or change after renewals, DNS updates, hosting moves, or load balancer changes. Monitoring keeps the renewal window visible instead of depending on memory or a single inbox.
Can PulseSSL monitor the certificate after checking it?
Yes. After checking a certificate, you can create an account and add the checked domain to your workspace. The free plan can monitor up to 2 domains with daily SSL checks and email reminders.
Check then monitor
Check your SSL certificate now, then keep it monitored.
Start with a live SSL certificate check. If the domain matters to production, checkout, APIs, or clients, add it to your PulseSSL workspace and get reminders before it expires.
No agent or install
Monitor up to 2 domains for free
Daily SSL expiration checks
Email reminders before renewal