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SSL Certificate Checker

Check SSL certificate validity, expiration date, issuer, and whether it covers www and non-www domains.

SSL Certificate CheckerGratisTechnical SEOChecks a live URL

Enter a public URL. We fetch the live page and analyse what search engines and AI crawlers see.

Key features of the SSL certificate checker

  • Checks SSL certificate validity and expiration date
  • Shows days remaining until certificate expiry
  • Displays certificate issuer and certificate authority
  • Checks certificate chain completeness
  • Validates that the certificate matches the domain

How to use the SSL certificate checker

  1. Enter the domain

    Type your domain (e.g., example.com) into the SSL certificate checker.

  2. Run the check

    Click 'Check SSL Certificate' to connect to your server and read the certificate details.

  3. Review validity

    Confirm the certificate is valid and hasn't expired.

  4. Check expiry date

    Note the expiration date — set a reminder to renew 30+ days before expiry.

  5. Fix certificate issues

    Contact your hosting provider or certificate issuer to renew, replace, or fix any certificate errors.

What is an SSL certificate checker?

The SSL Certificate Checker inspects the SSL/TLS certificate of any domain, providing details about the certificate's validity, expiration date, issuing certificate authority (CA), and encryption configuration. It alerts you to expired, expiring-soon, or misconfigured certificates that would break HTTPS and harm your SEO.

An expired or invalid SSL certificate causes browser "Your connection is not private" errors that drive away users and completely block Google from accessing your site. Proactive SSL monitoring is essential — certificate expiry is a common cause of sudden traffic drops and site outages.

Why use an SSL certificate checker?

A single expired SSL certificate can take your entire site offline — turning away users and preventing Googlebot from crawling. Certificate renewals are easy to forget, especially with 1-year certificates. This tool gives you advance warning of approaching expiry dates so you can renew before your site is affected.

SSL certificate checker: frequently asked questions

Something else? Ask the team

What is an SSL certificate?

An SSL (Secure Sockets Layer) or TLS certificate is a digital certificate that authenticates a website's identity and enables encrypted HTTPS connections between the browser and server.

How long does an SSL certificate last?

As of 2020, SSL certificates have a maximum validity of 398 days (about 13 months). Some free certificates from Let's Encrypt are valid for only 90 days and must be renewed automatically.

Does SSL affect Google rankings?

Yes. Google confirmed HTTPS as a ranking signal in 2014. Sites with valid SSL certificates have an advantage over HTTP sites. Expired or invalid certificates can cause ranking drops as Google may stop crawling the site.

What happens when an SSL certificate expires?

When an SSL certificate expires, browsers show a security warning blocking users from visiting your site. Google Chrome, Firefox, and Safari all block access to sites with expired certificates by default.

How often should I check my SSL certificate?

Check your SSL certificate monthly, or set up automated monitoring. At minimum, check 60 days before the expected expiry date to have enough time to renew without any service interruption.

Each one opens on its own page and works straight away, with no sign-up.

Ontdek meer gratis tools:Schema GeneratorMetatag GeneratorLLMs.txt GeneratorBrowse all free tools

Meer AI-vermeldingen winnen?

SSL Certificate Checker is one piece of the puzzle. See how ChatGPT, Gemini, Perplexity, and Google AI Overviews actually view your brand, and get a prioritised list of fixes, with a free AEO & GEO audit from AI Rank Lab.

One check is a start. The audit checks the whole site.

Voer een gratis AEO- en GEO-audit uit or Bekijk prijzen.

  • Scores SEO, answer-engine (AEO) and generative-engine (GEO) readiness
  • Lists the fixes, page by page
  • Then track whether ChatGPT, Gemini, Perplexity and Google AI Overviews cite you
fieldnote.app4,571 credits

Site audit

fieldnote.app · SEO, AEO and GEO

Illustrative data
SEO
82
+6
AEO
64
+11
GEO
58
+9
Pages
48
Fixesby impact
  • /pricing · Missing H1High
  • /blog/guide · No FAQ schemaMedium
  • /llms.txt · Not foundMedium
  • /about · Meta description too longLow

See where your whole site stands

Paste your site. The free audit scores it for SEO, answer engines and generative engines, with the fixes.

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