Guides
Understand, renew and troubleshoot your SSL certificates, step by step.
6 guides match “www”.
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Tutorials Reading time: 3 min
Adding a domain to monitor
Add a domain in seconds, understand the information displayed and what happens next.
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Fundamentals Reading time: 4 min
Understanding SSL/TLS certificates
What an SSL certificate really is, what it contains, who issues it, and why it always ends up expiring.
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Tutorials Reading time: 4 min
How to renew your SSL certificate
How to renew a certificate without downtime, whether you use Let's Encrypt, a paid certificate or a host that handles it for you.
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Troubleshooting Reading time: 4 min
Troubleshooting the most common SSL errors
Expired certificate, name mismatch, incomplete chain, mixed content: how to identify the cause of the error and fix it.
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Tutorials Reading time: 3 min
Importing multiple domains at once (CSV)
Prepare a CSV file, import it and understand the result: duplicates, plan limits and skipped rows.
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Tutorials Reading time: 3 min
Creating a free SSL certificate with Let's Encrypt and Certbot
Install Certbot, get a certificate for Nginx or Apache, handle wildcards and make sure automatic renewal really works.
A certificate to check right now?
The free checker shows its expiry date, issuer and covered domains.