SSL/TLS certificate checker
Check expiry, CN/SAN, issuer and TLS protocol. Enter domain, domain:port or URL.
How to check a certificate
- Enter a hostname, URL or hostname:port.
- Select “Check” and wait for the server’s TLS response.
- Review validity, issuer, CN/SAN and protocol version. A failed check does not always mean the website is down: a non-standard port or network restriction can also block the connection.
Basic SSL for shared hosting
- Included on supported plans
- Availability depends on the panel and domain
- Confirm support before ordering
Certificate renewal
- Shared hosting: subject to panel support
- VPS and servers: depends on configuration
- Use this checker to monitor expiry
HTTP→HTTPS redirect
- Web-server configuration review
- Redirect and HSTS after testing
- VPS and server setup is a separate task
SSL certificate FAQ
What does the tool check?
Certificate expiry, issuer, CN and SAN, TLS version, signature algorithm and days remaining.
Which input formats are accepted?
Domain, domain:port (e.g. example.com:8443) or full URL. SNI is used and the certificate is read directly via TLS handshake.
Are third-party APIs used?
No. The certificate is fetched via stream_socket_client and parsed with openssl_x509_parse.
Is a certificate included with HSTQ hosting?
Basic SSL is included on supported shared-hosting plans. On VPS and dedicated servers, issuance, installation and renewal depend on the selected configuration.
How much does an SSL certificate cost?
The price depends on the certificate type, provider, validity period and number of domains or subdomains. A free certificate is sufficient for many websites, while paid certificates cover more specific requirements.
Should I choose a free or paid SSL certificate?
A free certificate is often sufficient for simple websites and landing pages. A paid certificate may be appropriate when you need specific compatibility, branding, formal validation or a corporate use case. Choose for the requirement, not price alone.
Is SSL suitable for an online store?
Yes. SSL is essential for an online store because it protects customer data, authentication, enquiries, cart activity and payment pages.
Can one certificate cover several subdomains?
Yes. A wildcard or multi-domain certificate can cover several subdomains or domains when the project requires it.
Is it difficult to install an SSL certificate?
Installation is usually straightforward with a supported hosting panel or configured web server. After issuance, connect the certificate to the domain, enable HTTPS and, when appropriate, redirect HTTP traffic to HTTPS.
Does SSL affect trust and SEO?
Yes. HTTPS is a basic web standard. Without it, browsers may warn that a site is insecure and visitors may leave before viewing the content.
Can I issue a certificate before the website launches?
Yes, if the domain is registered and the project structure is known. In practice, issuance is often easier after the site is on the server or the domain points to the intended infrastructure.
How do I know which SSL certificate I need?
Check how many domains you use, whether you have subdomains and what type of project you run. One domain normally needs a single-domain certificate, a subdomain network may need a wildcard certificate, and several separate domains may need a multi-domain certificate.
