SSL Certificate Checker

Check a website’s SSL certificate: issuer, expiry date, covered names, chain and TLS version.

Verify Your Website Security Instantly

In today's digital landscape, website security is paramount for building trust with your visitors and protecting sensitive data. Whether you manage a small blog or a large e-commerce platform, ensuring that your HTTPS encryption is properly configured is critical. With our free online ssl certificate checker, you can quickly analyze your domain and verify that your cryptographic certificates are valid, up to date, and correctly installed.

Potato PDF provides fast, reliable file and web utility tools designed to make your daily tasks easier. This diagnostic tool eliminates the guesswork associated with HTTPS deployments, helping you avoid browser warning errors that can drive traffic away from your site.

Why Use Our SSL Certificate Checker?

Prevent Downtime: Keep track of expiration dates so you never get caught off guard by an expired certificate.
Improve SEO: Search engines favor secure sites; ensure your configuration meets modern standards.
Build User Trust: Guarantee that your visitors' data is encrypted and safe from interception.
100% Free: Run as many checks as you need without hidden fees, subscriptions, or software installations.

How to Check Your SSL Certificate Step by Step

Navigate to the Potato PDF SSL utility page.
Enter your full website domain name (e.g., example.com) into the input field.
Click the check button to initiate the diagnostic scan.
Review the comprehensive report detailing your expiration date, issuer, and protocol details.

Frequently Asked Questions

What does an ssl certificate checker actually do?

It queries your web server to retrieve your SSL/TLS certificate, verifies the digital signature against trusted root authorities, checks the expiration date, and ensures that the cryptographic protocols are secure.

How often should I test my domain?

It is recommended to run a diagnostic check at least once a month, and always immediately after renewing or installing a new certificate on your web server.

Is my domain data stored?

No, Potato PDF performs real-time lookups without logging or storing your search queries, ensuring complete privacy during your security audits.

More SEO tools

Keyword Density Checker — Analyze keyword frequency and density in any text.
Meta Tag Generator — Generate title, description, canonical and social meta tags.
SERP Preview Tool — Preview a Google-style search result on desktop and mobile.
Domain Age Checker — Check domain registration dates using public RDAP data.
Redirect Checker — Inspect the final URL and redirect count for a public link.
HTTP Header Checker — Inspect status and page response information for a public URL.
Website Screenshot Tool — Create a downloadable screenshot preview of a public website.
Mobile-Friendly Preview — Preview a page inside common mobile viewport sizes.
Canonical Tag Checker — Find and verify the canonical URL declared by a web page.
Robots Meta Tag Generator — Build robots meta directives for indexing and snippets.
Robots.txt Generator — Create a robots.txt, block AI crawlers and test which URLs bots may crawl.
Sitemap XML Generator — Build an XML sitemap from a list of URLs or by scanning your homepage.