Something: Download sample .key files
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Did you know that when you install an SSL certificate, you have to install not only your site's certificate, but also one or more intermediate (a.k.a. chain) certificates? Failure to install the correct chain can cause certificate errors in browsers, driving visitors away from your site. To complicate matters, some browsers cache intermediate certificates, or download missing intermediates on-demand, meaning that an improperly-configured chain could work in some browsers but not others, making this an annoying problem to debug.
This site tests if your server is serving the correct certificate chain, tells you what chain you should be serving, and helps you configure your server to serve it.
Test Your Server
Checks port (HTTPS) by default. For a different port, specify it with the hostname like:
Generate the Correct Chain
The generated chain will include your server's leaf certificate, followed by every required intermediate certificate, optionally followed by the root certificate.
Paste your certificate in the box below to generate the correct chain for it, based on the metadata embedded in the certificate.
Or, enter the hostname of a server to generate the correct chain for its certificate:
Include the Root Certificate?
You do not need to include the root certificate in the certificate chain that you serve, since clients already have the root certificate in their trust stores. Including the root is inefficient since it increases the size of the SSL handshake.
A separate chain that includes the root certificate is sometimes used for other purposes, such as OCSP stapling. Such advanced configuration is beyond the scope of this guide, although the generator will generate such chains if you check the "Include Root Certificate" box.
Configure Your Server
Note: some software requires you to put your site's certificate chain (e.g. ) and your private key (e.g. ) in separate files, while other software requires you to put them in the same file.
You can generate the combined file () with a command such as:
Don't forget to restart your server software after changing its configuration!
A Better Way to Get SSL Certificates
SSLMate lets you get SSL certs from the command line. SSLMate saves you time and effort by automating away the error-prone tedium of CSR generation, certificate chain assembly, and renewals.
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