- Free, no sign-up
- Up to 10 domains at once
- Live certificate, not cached
Free Bulk SSL Checker
Check the SSL/TLS certificate of up to 10 domains at once: expiry, issuer, hostname match, protocol and cipher. Instant results, no sign-up.
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With or without https://. We read each live certificate.
Advanced options
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How to use it
Check SSL certificates in three steps
No downloads, no account, no waiting. Results appear on this page seconds after you click.
Paste your domains
One per line, with or without https://. Up to 10 at a time, so you can check a whole client list in one go.
Click Check SSL
We connect to each domain the way a browser does and read the certificate it serves right now, not a cached or stale copy from a database.
Read the cards
Every domain gets a card: green when all is well, amber when it expires soon, red when something is wrong. Nothing to download.
Built forSite ownersAgencies and freelancersHosting providersSEO specialistsDevelopers
What it checks
What the SSL checker verifies
Everything a browser looks at before it shows the padlock, in one report per domain.
Validity and expiry
Valid from and until, and how many days are left before visitors see a warning.
Hostname match
Whether the certificate's names (CN and SAN, wildcards included) cover the domain you typed.
Issuer
Which certificate authority signed it, such as Let's Encrypt, Sectigo or DigiCert, so you know where to renew.
Protocol and cipher
The TLS version and cipher suite your server negotiates, details most free checkers skip.
Self-signed certificates
Flags certificates that signed themselves instead of coming from a public certificate authority, so you know why browsers reject them. Others show "Trusted CA".
Bulk in one go
Ten domains per check instead of running the same test ten times.
Reading the results
What your results mean
Each card starts with a status. Here is what to do about each one.
Valid and trusted
The certificate is current, covers the domain and comes from a trusted authority. Nothing to do. Note the expiry date if you renew by hand.
Expiring soon
30 days or fewer are left. Renew now: with Let's Encrypt, check that auto-renewal (certbot or your host's panel) is actually running.
Expired
Browsers already block visitors with a full-page warning. Renew the certificate and reload your web server today.
Domain mismatch
The certificate was issued for other names, often example.com without www (or the other way round). Reissue it with every name you use.
Why it matters
Why your SSL certificate matters
Installing SSL is never a one-step job. You choose a certificate type, generate a CSR (certificate signing request), get it signed, install the certificate together with its intermediate chain, and then keep it renewed. One missed step can cost you more than you would expect.
A certificate problem rarely shows up for you, the owner, because your browser may have a cached copy. But every new visitor and every search engine sees it.
Visitor trust
An expired or wrong certificate shows "Your connection is not private". Most people leave at that screen and do not come back.
Search rankings
HTTPS is a Google ranking signal, and a broken certificate can stop crawlers from reaching your pages at all.
Data security
TLS encrypts logins, forms and payments between your server and the visitor. Old protocols and weak ciphers leave gaps.
Certificate types
DV, OV and EV certificates
All three encrypt traffic in exactly the same way. The difference is how much the certificate authority checks before it signs. Our checker reads all three the same way and shows who issued them.
| Type | What the CA checks | Typical issue time | Good for |
|---|---|---|---|
| DV (Domain Validated) | Only that you control the domain | Minutes, often free (Let's Encrypt) | Blogs, small business sites, most websites |
| OV (Organization Validated) | The domain plus that your organisation is real | A few days | Company sites that want the organisation name in the certificate |
| EV (Extended Validation) | A full legal and identity check of the organisation | Days to weeks | Banks and large shops, though browsers no longer show a green bar for it |
FAQ
Frequently asked questions
What does an SSL checker check?
It connects to the site and reads the certificate the server sends: the validity dates and days left, the names it covers (Common Name and Subject Alternative Names), the issuing authority, whether it is self-signed, and the TLS protocol and cipher in use. It does not run a full chain-of-trust audit against every browser's trust store; for a deep server test, such as missing intermediate certificates, use a dedicated tool like Qualys SSL Labs.
Is this SSL checker free?
Yes, with no sign-up and no daily cap. A fair-use limit of 10 checks a minute and 100 an hour keeps it fast for everyone.
How many domains can I check at once?
Up to 10 in a single check. Paste one domain per line and click Check SSL. Each domain gets its own result card.
What happens if my SSL certificate expires?
Browsers show visitors a full-page "Your connection is not private" warning, and most leave straight away. It can hurt your search visibility, since HTTPS is a Google ranking signal, and it can break API calls, webhooks and payment integrations that need a trusted connection.
When should I renew my certificate?
At least 2 to 4 weeks before it expires. Free Let's Encrypt certificates last 90 days and should renew themselves; this checker shows quickly whether that is working.
Does it work for subdomains and wildcard certificates?
Yes. It reads every name on the certificate, including wildcards like *.example.com, and tells you whether the domain you entered is covered.
Why does a site work in my browser but show an error here?
Your browser may have cached an older certificate, or the server sends a different one depending on the name used. We always read the live certificate for the exact domain you typed.
Can I check a self-signed certificate?
Yes. The tool still connects and shows the certificate details, but the card says "Self-Signed, Not Trusted", because browsers do not trust self-signed certificates by default.
Can I check a server on a custom port?
There is a Port box under Advanced options, set to 443 by default. For security, only the standard web ports, 443 and 80, can be checked, so a staging server on a port like 8443 will not work here.
Do you store the domains I check?
No. A result is kept for a few minutes so repeat checks are fast, then it is gone.
Keep going
More free SEO tools
A valid certificate is the foundation. These checks cover what comes next.
- HTTP Status Checker: confirm http:// redirects to https:// in one hop.
- Robots.txt Tester: check that crawlers are allowed to reach your pages.
- Canonical Tag Checker: make sure canonicals point at the https version.
- Noindex Tag Checker: make sure key pages are not hidden from Google.
- Schema Markup Validator: check your structured data for errors.
- Meta Tag Analyzer: preview the page in Google and on social media.
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Check your certificates right now
Free, no sign-up. Paste up to 10 domains and get results in seconds, before your visitors see a warning.